Which open-source alternative replaces Basecamp Campfire chat?
Campfire, Mattermost and Nextcloud Talk are the three realistic replacements for Basecamp's project chat, and each pairs with a self-hosted project tool: Campfire or Mattermost with OpenProject or Nextcloud for planning, and Talk with Nextcloud for files and calendars. The choice depends on three requirements: how many people will post at the same time, which systems must send messages into the chat, and how user accounts are authenticated. Everyday conversation is the least of these, since all three options handle it. A team facing a renewal or data residency deadline should settle those three answers first, because they determine which option needs extra infrastructure and which can run on a single server.
Campfire suits a small team that wants Basecamp's chat model with few moving parts. 37signals publishes it under the MIT license, and it can be self-hosted from a Docker image, so confirm its current maintenance status and feature set against how your teams use Basecamp today. Mattermost suits teams where channels, bots and integrations matter most. It runs as a single Linux binary on PostgreSQL, and its compiled binaries are MIT licensed. High availability needs the Enterprise tier, plus shared file storage on S3, an S3-compatible service or NAS, because local file storage risks corrupting files. Nextcloud Talk suits organizations already running Nextcloud, and the Nextcloud All-in-One installation bundles Talk with recording.
Settle identity first, because it is the hardest decision to reverse. Nextcloud's LDAP app lets directory users sign in with their existing credentials, and Nextcloud also documents OpenID Connect and SAML backends, so confirm which of these your directory supports. Mattermost places SSO and AD/LDAP sync in its paid plans, and Nextcloud Enterprise lists a 100-user minimum, so ask each vendor for a written quote that states plan, user count and support level. Then run a pilot with one live project, a list of the systems that must post into the chat, and your expected peak concurrent users, and record where message files and backups will be stored.
How Campfire, Mattermost and Nextcloud Talk cover Basecamp chat
This table maps the main parts of Basecamp's project chat to Campfire, Mattermost and Nextcloud Talk, with notes on gaps and items to confirm in the release you plan to deploy. Where a cell says to confirm, check the current release notes or the vendor before assuming parity. Mattermost has the most documented admin and identity detail, while Campfire needs the most verification against your workflow.
| Capability | Campfire | Mattermost | Nextcloud Talk |
|---|---|---|---|
| Real-time rooms per project | Group chat rooms; confirm whether rooms can be scoped per project in your release | Public and private channels that can be named per project; confirm your team and channel layout | Conversations that can be tied to project folders or groups; confirm conversation types in your version |
| Threaded conversation | Confirm whether replies are threaded or flat before relying on it | Reply threads on posts; confirm the collapsed reply view in your server version | Message replies are supported; confirm whether thread-style grouping matches your needs |
| File sharing | Confirm attachment size limits and where files are stored | Attachments on local or S3-compatible storage; HA clusters need shared storage | Shares files from Nextcloud Files; confirm permissions for guests and external users |
| Notifications | Confirm email and mobile notification options | Per-user desktop, mobile and email notification settings; confirm options in your edition | Uses the Nextcloud notification system; confirm mobile push setup in your deployment |
| Search | Confirm search scope and history retention | Confirm search scope for your plan and deployment | Full-text search is bundled in Nextcloud All-in-One; confirm its coverage of Talk messages |
| Guest access | Confirm whether outside participants can join rooms without a full account | Guest accounts are an admin option; confirm availability on your plan | Guests can join by invitation; confirm guest limits and file access in your version |
| SSO and directory sync | Confirm supported identity providers and directory options | SAML, OIDC, OAuth and AD/LDAP sync from the Professional plan, per the pricing page | LDAP app, OpenID Connect and SAML backends are documented for Nextcloud accounts |
| Admin controls and licensing | MIT-licensed, self-hosted from a Docker image; confirm admin tooling | Binaries under MIT; high availability and FIPS features are Enterprise plan items | AGPL-3.0; upgrade one major version at a time with a backup first |
When Campfire, Mattermost or Nextcloud Talk fits
Each option replaces Basecamp's project chat at a different scale and with a different surrounding stack. The choice usually depends on whether your team wants a lightweight room model, a full channel and integration platform, or chat bundled with the files and calendars you already run on Nextcloud.
Campfire for small teams
Campfire is 37signals' own MIT-licensed chat tool, the closest match to Basecamp's room-based model. It can be deployed from its Docker image on your own server, which keeps the setup small and the operating burden low. Check that its feature set covers your needs for search, retention, identity and integrations before you commit, since it has a narrower scope than the other two options. It pairs naturally with OpenProject or Nextcloud for the project records themselves.
Mattermost for channels and integrations
Mattermost is an open core, self-hosted platform that runs as a single Linux binary with PostgreSQL as its database. Its channel model, bot and integration options suit teams that connect chat to build pipelines, ticketing or alerts. SSO (SAML, OIDC, OAuth) and AD/LDAP user sync start at the Professional plan, and high availability requires the Enterprise plan. Plan prices are not public, so ask Mattermost sales for a written quote before you plan the budget.
Mattermost high availability needs
A Mattermost high availability cluster needs redundant application servers, redundant database servers and redundant load balancers. Every node must mount shared file storage, such as Amazon S3, an S3-compatible service or NAS, because local file system storage will not work correctly and risks corrupting files. Plan for PostgreSQL operations and storage as ongoing work, not a one-time install. Confirm these components with your platform team before you size the deployment.
Nextcloud Talk alongside Files and Calendar
Nextcloud Talk is the natural choice for teams already standardizing on Nextcloud Files and Calendar. Chat, file sharing and calendar invitations share one identity layer and one administration console, which reduces the number of systems to patch and back up. Confirm that Talk meets your requirements for channel structure and integrations, since it is less extensive than Mattermost's integration model. Nextcloud All-in-One can bundle Talk with recording for a single-host install.
Identity and directory integration
Whichever chat option you choose, identity decides how much administration you carry. Mattermost offers SSO and AD/LDAP sync from its Professional plan, and Nextcloud supports LDAP and Active Directory logins along with OpenID Connect and SAML backends. Map joiners, leavers and group membership to your directory before go-live, so access to project rooms follows the same rules as access to the repositories and files behind them. Confirm each feature against your directory product's version.
Upgrade cadence and support
Each option sets its own upgrade rhythm, and that rhythm drives recurring effort. Mattermost publishes server releases on the 16th of each month and offers Extended Support Releases for longer maintenance windows. Nextcloud publishes a major version every four months and forbids skipping major releases, so each upgrade must be planned in sequence with a backup beforehand. Ask any vendor or implementation partner who will own patching, testing and rollback for your environment.
Pairing chat with OpenProject or Nextcloud for project work
With OpenProject as the project record, the usual split keeps work in OpenProject and day-to-day talk in Mattermost. OpenProject holds work packages, versions, Gantt views, wiki pages, meetings and per-project forums, so decisions that need a trail stay attached to the project. Mattermost holds quick coordination in channels, and the team decides which of those exchanges must be copied back into a work package.
- Where conversation lives: Keep status and decisions in OpenProject forums or work package comments, and use Mattermost channels for coordination that does not need a permanent record.
- Where documents live: Keep specifications in the OpenProject wiki or attached to work packages, then share links in Mattermost and avoid uploading duplicate copies.
- How links work: Paste work package URLs into Mattermost messages by hand. Confirm with the vendors whether a current Mattermost and OpenProject integration covers notifications before you design a workflow around it.
- Shared identity: OpenProject LDAP synchronization and SCIM provisioning sit in paid Enterprise plans on the OpenProject pricing page, while Mattermost includes AD/LDAP user sync from its Professional plan.
Before rollout, agree which tool is the final record for a decision and write that rule into the team's working agreement.
Nextcloud keeps tasks, files and chat in one server, which suits teams that want a single self-hosted suite. Deck provides kanban boards and cards, Files holds project documents with sharing controls, and Talk provides chat and calls. Nextcloud Server is licensed under AGPL-3.0, so the platform itself carries no per-seat license fee, although Nextcloud GmbH sells Enterprise support on top of it.
- Where conversation lives: Use Talk conversations for project threads, and keep formal decisions in a Deck card or a document in Files so they can be found later.
- Where documents live: Store project files in Files with folder-level sharing, and link to them from Deck cards and Talk messages rather than copying content between apps.
- How links work: Deck cards and Talk conversations sit on the same server, so links to them are native. Confirm which Talk features your version supports for attaching files and cards before you publish a usage guide.
- Shared identity: The LDAP app lets directory users appear in Nextcloud and sign in with directory credentials, and Nextcloud also documents OpenID Connect and SAML backends in its LDAP authentication documentation.
- Upgrade planning: Upgrades must move one major version at a time, with a backup before each step and third-party apps disabled until confirmed compatible, which affects Deck and Talk alike.
Finally, test that Deck, Files and Talk all honor the same account disablement, so a departing user loses access to every part of the suite at once.
Whichever project tool the team keeps, the chat tool must trust the same user directory, or each system ends up with its own accounts and its own offboarding gaps. The practical question is which system is the source of truth for identity, and which protocol each application uses to read it. Most teams choose a corporate directory such as Active Directory or LDAP, or an identity provider that speaks OpenID Connect or SAML.
- Directory choice: Pick one source for groups and accounts, then confirm it can feed OpenProject, Mattermost and Nextcloud through the protocols each one supports.
- Provisioning and removal: OpenProject's SCIM provisioning is in paid Enterprise plans. Confirm whether your target plan covers the lifecycle you need, including account deactivation.
- Single sign-on: Mattermost supports SAML, OIDC and OAuth single sign-on, and its SAML configuration is documented in the Mattermost SAML guide. Check that group membership, not only login, maps to the right channels and project roles.
- Test accounts: Run a leaver test in a staging environment for each application, confirming that a disabled account stops working in chat and in the project tool at the same time.
Identity decisions shape both the security review and the day-to-day admin workload, so settle them before the chat and project tools are configured.
The two pairings differ mainly in what the team pays for and where administration effort lands. A Mattermost and OpenProject pairing adds two products with their own upgrade cycles, while a Nextcloud pairing concentrates tasks, files and chat in one server with one upgrade path. Neither choice removes the need for hosting, backups and an administrator who owns the rollout.
- Recurring license cost: Nextcloud's pricing page lists Enterprise Standard at 71.29 euros per user per year for 100 or more users, with a 100-user minimum. Mattermost publishes no public prices and sells seat licenses on annual subscriptions, so request a quote for your headcount.
- One-time work: Migration of existing content, identity integration and configuration are one-time costs. Ask each vendor or partner to price these as separate line items in the written scope.
- Recurring operations: Hosting, backups, monthly maintenance and upgrades recur. Nextcloud's major versions are supported for about a year each, so budget time for regular upgrades in either pairing.
- Quote requests: Ask for seat counts, the plan that includes the features you need, support hours, and the cost of a separate identity integration.
Before choosing, write down your expected headcount and the features you cannot give up, then compare quotes against that list.
Running chat next to the rest of the suite
Chat rarely runs alone. Once Mattermost or Nextcloud Talk sits beside OpenProject or Nextcloud, identity, notifications, file links and attachment storage decide whether the setup feels like one system or three. The cards below cover the decisions to make before cutover.
Shared sign-in through one identity provider
Decide which directory is the source of truth before users are created. Mattermost documents SAML single sign-on, and its AD/LDAP user sync is included from the Professional plan, while Nextcloud's LDAP app and its OpenID Connect and SAML backends let users sign in with directory credentials. Confirm that the same identity provider covers chat, project tools and file storage, and that deprovisioning a leaver removes access in all three. Ask the vendor which features need a paid tier before you design around them.
Notifications and bots
Work items in OpenProject or Nextcloud should reach the right channel without manual copying, but each integration adds a service account and a credential to rotate. List the events that must post to chat, such as task assignments, due dates and file shares, and decide who owns each webhook or bot token. Test that notifications respect project membership so private project activity does not appear in a public channel.
File links back to the document store
Chat messages that link to Nextcloud files or OpenProject attachments keep one copy of each document, but the link is only as good as the permission behind it. A user who can read a channel should not inherit access to a file they could never open in the source system. Test a link from a channel member who lacks file access, and confirm whether previews and thumbnails respect the same rules.
Shared storage for chat high availability
Mattermost high availability depends on redundant application servers, database servers and load balancers, and it is offered only on Enterprise and Enterprise Advanced plans. Every node must mount the same file storage, either Amazon S3, an S3-compatible service or a NAS. Local file system storage will not work correctly and risks corrupting files, so plan the storage tier before buying the cluster.
Data residency for chat attachments
Attachments in chat are often the largest and most sensitive data a team sends. Decide where they are stored, whether the object store sits in the same country as the database, and how long they are kept after a channel is archived. Confirm that backups of the chat database and the file store are taken together, so a restored message never points to a missing file.
Upgrade cadence across components
Mattermost publishes a new server version each month, and extended support releases carry a longer support window. Nextcloud publishes a new major version every four months and forbids skipping major releases during upgrades. Map these two cadences against the OpenProject or Nextcloud upgrade window and assign one owner for compatibility testing before any patch goes live.
Moving Basecamp chat history and people out of Basecamp
This sequence moves Basecamp chat content and team members onto a self-hosted chat server in a controlled order, so that history is preserved, access is restored for the right people, and the old Basecamp data is kept as a read-only record.
Export project content before cancellation
The Basecamp account owner runs the export while access is still active, using the owner-only HTML export for all, selected or archived projects, or the OAuth 2.0 API if you need structured data. Export before cancelling, because cancellation removes access to the content. Confirm with Basecamp which items each export format includes, especially chat transcripts (Campfire lines) and attachments, since the HTML export is the most complete human-readable record. The step is done when the export files are downloaded, opened and spot-checked for a few chat rooms, and stored in an encrypted location with a named owner.
Decide what chat history to import or archive
Work through each Basecamp chat room and decide whether its history is imported into the new tool, kept only as an archive, or left out. Basecamp chat history may not map one-to-one to a target chat tool: threads, reactions, room structure and attachment metadata can differ, so confirm the import path for each candidate with the vendor or project documentation before committing. Record the decision per room in a simple register with the owner, the retention reason and the target location. The step is done when every room has a recorded decision that the business and any compliance owner have approved.
Stand up the chosen chat server
The platform team installs the chosen self-hosted chat option in your own infrastructure: Campfire from its Docker image, Mattermost on a Linux host with PostgreSQL, or Nextcloud Talk within a Nextcloud instance. Set up the database, file storage, backups and TLS before users arrive, and confirm the supported database and runtime versions in the vendor's requirements for the release you choose. Plan for patching cadence, since each option publishes its own release and support schedule. The step is done when the server is reachable on an internal test address, a backup has been restored successfully on a separate host, and the upgrade path has been written down.
Configure identity, roles and channels
Connect the chat server to your directory so that people sign in with their corporate credentials, using LDAP or Active Directory synchronization, or SAML or OpenID Connect where the chosen tool supports them. Confirm in the vendor documentation which of these are included in your edition, because some directory sync and SSO features sit in paid tiers. Then create the channels or rooms that replace Basecamp's project chat, assign owners and set who can create new spaces. The step is done when test accounts from each group can sign in, see only the channels they should, and removed accounts are blocked from logging in.
Invite people and map project memberships
Create the user list from the Basecamp people export and your directory, then match each Basecamp project team to the matching channels or rooms in the new tool. Remove guests and former contractors who should not carry over, and record the exceptions for the security team. Send a short onboarding note that explains where conversations now live and where the archive is kept. The step is done when every active Basecamp project has a named target channel, each membership has been checked by its project owner, and the list of accounts without a match has been reviewed.
Import selected history and load the archive
Import the rooms approved in the decision register where the target tool supports a documented import path, and load the remaining history into a read-only archive, such as the exported HTML files stored on a restricted file share or in Nextcloud with access limited to the archive group. Keep the original export intact and record a checksum for each archive file. Test that a sample of imported messages matches the source, and note any formatting or attachment differences. The step is done when the import log shows no unexplained failures, the spot checks pass, and the archive is searchable by the people who need it.
Run cutover with a read-only archive period
Announce a cutover date, switch new project conversations to the self-hosted chat, and set the Basecamp rooms to read-only in your own process so that no new messages split the record. Keep the archive available to named readers for a defined retention window agreed with your compliance owner, and monitor the new tool for sign-in failures and missing channel members. Resolve any reported gaps before the archive is retired. The step is done when new conversations are happening only in the new tool, the archive is confirmed as readable, and the retirement decision for the archive is signed off and dated.
Keeping Mattermost and Nextcloud current after go-live
Plan for upgrades as recurring work from the first day of go-live. Mattermost publishes a new server version in binary form on the 16th of each month, so the team needs a named owner who reviews each release, decides whether to adopt it, and schedules the change. Mattermost also offers Extended Support Release versions for teams that want fewer upgrades. The current ESR is v11.7, released on 2026-05-15 with support ending 2027-05-15, and the previous ESR, v10.11, reached end of life on 2026-08-15. Before choosing a track, confirm with your own environment which version line your compliance and change-control process can keep pace with, and check the Mattermost server releases page for the current support dates.
Nextcloud follows a different rhythm. It publishes a new major version every four months and supports each one for a year through monthly maintenance releases. Nextcloud 35 was released on 16 September 2026 with end of life in September 2027, and Nextcloud 36 is scheduled for 17 February 2027. Nextcloud does not allow skipping major releases, so an instance that falls two versions behind must be moved forward one major version at a time. Each step needs a backup first, and third-party apps should be disabled until they are confirmed compatible with the new release. Document this sequence in your runbook and rehearse it on a staging copy of your data before each change, because a failed upgrade on production chat or file storage is expensive to recover from.
Whether your team performs these upgrades or retains a partner, the work recurs and includes testing, backup verification, rollback planning and sign-off on integrations such as LDAP sync and SSO. Decide who owns each step, who approves production changes and how far behind you are willing to run. Ask any implementation partner for a written scope covering how many upgrade cycles per year it covers, what testing is included and how urgent security fixes are handled. Those terms drive the ongoing cost far more than the initial installation does.
Questions buyers ask before replacing Basecamp chat
What drives the cost of self-hosting team chat?
The cost comes from five components: infrastructure, database, file storage, administration and licensing. Infrastructure and storage are paid to your cloud provider or data center, and they scale with users, message history and file volume. The database is usually PostgreSQL, which is free to run but needs backups and capacity planning. Administration is staff time for upgrades, monitoring and user management, and it recurs every month. Licensing is the variable: Mattermost sells Professional, Enterprise and Enterprise Advanced as prepaid annual subscriptions by seat, and Nextcloud Enterprise is sold in Standard, Premium and Ultimate tiers with a 100-user minimum. Nextcloud's pricing page lists list prices starting at 71.29 euros, 104.99 euros and 204.75 euros per user per year for 100 or more users, with lower rates from 200 users. Mattermost does not publish prices, so ask sales for a written figure.
How long does a chat migration from Basecamp take?
The duration depends on the volume of history you keep, how many people and integrations need to switch, and how identity is set up. Chat volume affects the export, transformation and import steps, and it also affects how much you test. Identity is often the longest step: if you use single sign-on or directory synchronization, the identity provider, group mapping and login testing must work before users arrive. Integrations such as bots, webhooks and notifications need to be rebuilt or repointed one by one. No timeline is given here because none has been researched for this comparison. Ask any implementation partner for a written scope that lists the data sets, integrations, user groups and test cycles, and agree the timeline in that document.
What does the internal team need to provide during the migration?
Your team needs to make decisions and own the systems after go-live. The main inputs are a list of channels or conversations to keep, an owner for each user group, access to your identity provider and a named contact for integrations. Someone must also approve the retention rules for old messages and attachments, since these carry compliance weight. After launch, the team takes on upgrades, backups and monitoring. Nextcloud documents that major versions must be upgraded one at a time, with a backup before each upgrade and third-party apps disabled until confirmed compatible. Plan for that work in your operations calendar before you commit to self-hosting.
Can our own team run a self-hosted chat migration without outside help?
Yes, a team with Linux, PostgreSQL and reverse proxy experience can deploy Mattermost or Nextcloud Talk alone, using the official documentation. The harder parts are high availability, identity integration and migration testing. Mattermost high availability is available only on Enterprise and Enterprise Advanced plans and requires shared file storage on Amazon S3, an S3-compatible service or NAS mounted on every node, because local storage risks corrupting files. If your team lacks that experience or capacity, DeployOpen plans, implements, integrates, hardens, backs up and documents self-hosted platforms in your own infrastructure under a fixed-scope written agreement, and offers retainers for ongoing support and upgrades.
Which identity features require a paid plan?
Check identity requirements before choosing a licence tier. According to the Mattermost pricing page, SSO through SAML, OIDC or OAuth and AD/LDAP user sync are included from the Professional plan, high availability clustering and FIPS 140-3 compliance start at Enterprise, and air-gapped deployment is in Enterprise Advanced. Nextcloud's LDAP app lets directory users log in with their directory credentials, and Nextcloud also documents OpenID Connect and SAML backends. Confirm with the vendor which features are in your target tier before you sign, and ask the implementer to test each login path in a staging environment.
What should we ask for in a written quote for self-hosted chat?
A useful quote separates one-time work from recurring costs. Ask for the scope in writing, including the platforms, the number of users and groups, the data sets to migrate, the integrations to rebuild and the testing and cutover plan. Ask for the deliverables, such as runbooks, backup procedures and access documentation. Ask for the recurring items separately: software subscription or Enterprise licence per user, hosting and storage, support or retainer hours, and upgrade work. For licence quotes, ask for the list price per user, any minimum seat count, the term and how the price changes if headcount grows. DeployOpen issues fixed-scope quotes from a written scope, and does not publish a price list.
How do upgrades affect a self-hosted chat platform over time?
Upgrades are a recurring task, and their frequency depends on the platform. Mattermost releases a new server version in binary form on the 16th of each month, and it publishes Extended Support Releases with fixed support windows, such as v11.7, which is supported until 2027-05-15. Nextcloud publishes a new major version every four months and supports each for one year with monthly maintenance releases. Nextcloud 35 was released on 16 September 2026 with end of life in September 2027. Choose a release line your team can follow, and budget the upgrade and testing time each cycle.
Official sources for chat and project platforms
Versions, licenses and plan features in this area change on fixed schedules, so check them against the vendor's own pages before you commit to a platform. For Mattermost, start with the Mattermost server releases page, which lists the monthly binary release dates, the Extended Support Release line and the end-of-support date for each version. Pick the version you deploy from that list, not from a blog post or a package mirror, and write its support end date into your upgrade calendar. The support end date is the number that should drive your plan, because it tells you how long a deployment stays patched without a major upgrade.
Plan features are where the cost decision sits, and they are stated on pricing pages that change more often than release notes. The Mattermost pricing page shows which tier includes SSO and directory sync, high availability and air-gapped deployment, and it publishes no list prices, so ask sales for a written quote that names each feature you rely on. The OpenProject pricing page does the same for SSO, LDAP synchronization and the Jira Migrator. Ask each vendor to confirm in writing which tier includes the features in your requirement list, and keep that confirmation with your procurement file.
For Nextcloud, the Nextcloud maintenance and release schedule sets the major version lifecycle, and the Nextcloud system requirements list the supported database, PHP and web server combinations for the version you pick. Confirm that your current operating system and database versions appear in that matrix before you build the environment. Re-check both pages before each upgrade window, because a version that is supported today may fall out of the matrix on the next major release.
How DeployOpen scopes and delivers a chat replacement
DeployOpen plans, implements, integrates, hardens, backs up and documents self-hosted chat inside your own cloud accounts, data centers or air-gapped networks. We start from your written scope, so the choice between Campfire, Mattermost and Nextcloud Talk, and how it sits next to OpenProject or Nextcloud, is made against your actual users, identity provider and retention needs.
How we scope
- Inventory which Campfire rooms, users and integrations your team relies on today
- Confirm identity requirements such as SSO and directory sync before choosing a chat platform
- Agree in writing which platform, hosting environment and project tool pairing is in scope
How we build
- Deploy the chosen chat platform in your infrastructure with PostgreSQL and file storage sized to the scope
- Configure channels, user provisioning, integrations and links to OpenProject or Nextcloud
- Run security testing of the deployed chat service, including authentication and access controls
How we hand over
- Document the architecture, configuration, backup and upgrade procedures for your own administrators
- Provide evidence of controls and settings to support your internal or external compliance assessments
- Train your administrators on user management, retention and the upgrade path for your chosen version
How we support
- Engagements are fixed-scope, with deliverables and timelines agreed before work starts
- Ongoing support, upgrades and continuous testing are available as a retainer
- Upgrades follow each platform's own release schedule, which we confirm against your scope
