If you want to own your customer feedback, run it on your own servers, or avoid per-user pricing, there's now a solid set of open-source options. We compared the actively maintained ones on license, stack, hosting, and what each is best at.
We build Crumb, which is on this list, so weigh our take accordingly. We've tried to describe every tool fairly, using its own site and source code, checked in September 2026.
At a glance
| Tool | License | Stack | Hosted option | Best for |
|---|---|---|---|---|
| Crumb | AGPL-3.0 | TypeScript, Postgres | Free; from $19/mo flat | B2B teams prioritizing by revenue |
| Fider | AGPL-3.0 | Go, React, Postgres | Free up to 250 posts; $25/mo | A simple public voting board |
| Quackback | AGPL-3.0 | TypeScript, Bun, Postgres | Free; $29 to $99/mo | Feedback plus support tools in one |
| ClearFlask | Apache-2.0 | Java | From $29/mo | A permissive license and whitelabeling |
| LogChimp | AGPL-3.0 (open core) | Node, Vue, Postgres | None listed | A lightweight board and roadmap |
Crumb
- License: AGPL-3.0
- Self-host: one docker compose file, Postgres
- Hosted: Crumb Cloud, free or from $19/mo flat per workspace
Crumb is built around one idea: tie every request to the account and ARR behind it. Customers send feedback from an in-app widget, and it lands in an inbox you can sort by revenue. From there, requests group into initiatives, go to Linear, Jira, or GitHub as tickets (AI-drafted on Crumb Cloud's Team plan and up), and the customer hears back automatically when they ship. It also has a public roadmap, HubSpot and Salesforce sync, and an MCP server for AI assistants. Less suited to: consumer apps or open-source projects that just want a public voting board; the AI features, session replay, and one-click integrations are on Crumb Cloud's paid plans.
Fider
- License: AGPL-3.0
- Self-host: Docker, Postgres
- Hosted: free up to 250 posts, Pro $25/mo
- GitHub: about 4.5k stars, actively released
Fider is the most established open-source voting board. It does the core job well: post ideas, vote, comment, tag, and move ideas through statuses. A roadmap view arrived in 2026 (free when self-hosted, Pro on Fider Cloud), and it supports webhooks and OAuth sign-in. Less suited to: teams that need revenue context or built-in tracker and CRM integrations. See Crumb vs Fider.
Quackback
- License: AGPL-3.0
- Self-host: Docker or one-click Railway, with every feature
- Hosted: Free (1 seat, 50 posts), then $29, $59, or $99/mo
Quackback is a newer, fast-moving project with feedback boards, voting, a roadmap, a changelog, an AI agent, an MCP server, and integrations including Linear, Jira, Slack, HubSpot, and Stripe. It has grown into a broader support suite with an inbox, help center, and status page. Less suited to: teams that want a focused feedback tool rather than a support platform.
ClearFlask
- License: Apache-2.0
- Self-host: Docker Compose or Helm; free up to 100 posts, then $9/mo license
- Hosted: from $29/mo, unlimited teammates
ClearFlask is the main permissively licensed option. It offers a roadmap, voting with credits, custom domains, SSO, whitelabeling, and GitHub and Intercom integrations. Less suited to: teams that want everything free when self-hosting, given the 100-post cap.
LogChimp
- License: AGPL-3.0, with some enterprise directories under a separate license
- Self-host: Node, Postgres
LogChimp is a lightweight board-and-roadmap tool with branding and role-based access, and it is actively maintained. Less suited to: teams that need integrations; it covers the basics.
Tools to avoid for new projects
Astuto was a popular Rails-based option, but its repository was archived in January 2026. Feedbacky hasn't had a release since 2022. Both still work, but you'd be on your own for fixes.
How to choose
- You want a free public voting board: Fider.
- You want feedback and support in one tool: Quackback.
- You need a non-copyleft license: ClearFlask.
- You sell to businesses and want to prioritize by revenue: Crumb.
Moving off a hosted tool rather than starting fresh? See the best Canny alternatives, the best UserVoice alternatives, Canny vs Productboard, and Canny vs UserVoice, which cover hosted options as well as open source. Every comparison we've written is on one page.
Frequently asked questions
What is the best open-source feedback tool?
It depends on the job. Fider is the simplest mature voting board. Quackback bundles feedback with support tools. ClearFlask is a permissively licensed option. Crumb is built for B2B SaaS teams that prioritize by customer revenue and want feedback pushed to Linear, Jira, or GitHub.
Which open-source feedback tools can I self-host for free?
Crumb, Fider, Quackback, and LogChimp are free to self-host under the AGPL. ClearFlask is Apache-2.0, and its self-hosted version is free up to 100 posts, with a paid license above that.
Is Astuto still maintained?
No. Astuto's GitHub repository was archived in January 2026, so we don't recommend starting a new project on it.