Open source Developer tools
We list 19 Developer tools tools, ranked by community votes and market presence (how often other tools are positioned as alternatives to them). Top picks right now: Supabase, Appsmith, Omnara.
| # | Tool | Pricing | Starts at | Best for | Platforms | Votes |
|---|---|---|---|---|---|---|
| 1 | Supabase Open-source Firebase alternative on Postgres | Open source | $25/mo | Developers | web | 0 |
| 2 | Appsmith Open-source internal tool builder | Open source | $15/mo | Developers | web | 0 |
| 3 | Omnara Open-source platform for running durable AI agents on any model | Open source | $0 | Developers, Small businesses, Enterprise | web, macos, linux | 0 |
| 4 | Overmind Open-source loop that turns AI agent traces into models you own | Open source | $120/mo | Developers, Small businesses, Enterprise | web, linux | 0 |
| 5 | Windmill Open-source developer platform for scripts, flows and apps | Open source | $10/mo | Developers | web | 0 |
| 6 | Backenly Open-source Postgres backend that coding agents build and maintain | Open source | $25/mo | Developers, Small businesses, Freelancers | web | 0 |
| 7 | beacon.sh Open-source memory layer that carries lessons across coding agents | Open source | $0 | Developers, Enterprise, Small businesses | macos, windows, linux, web | 0 |
| 8 | BeeBranch Open-source desktop Git client for GitLab and GitHub teams | Open source | $0 | Developers, Enterprise | macos, windows, linux | 0 |
| 9 | Better Auth Framework-agnostic TypeScript authentication | Open source | $20/mo | Developers | web | 0 |
| 10 | fastbrowse Open-source browser agent that cites page quotes for every answer | Open source | $29/mo | Developers, Small businesses, Enterprise | web | 0 |
| 11 | Flagsmith Open-source feature flags and A/B tests, cloud or self-hosted | Open source | $45/mo | Developers, Small businesses, Enterprise | web | 0 |
| 12 | Hyperresearch Deep research reports with every citation checked against source | Open source | $0 | Developers, Enterprise, Small businesses | web | 0 |
| 13 | Insomnia Open-source API client for REST, GraphQL, gRPC and MCP from Kong | Open source | $12/mo | Developers, Small businesses, Enterprise | macos, windows, linux | 0 |
| 14 | Inyon Open-source phone and browser remote for terminal coding agents | Open source | $0 | Developers, Freelancers | web, android, macos, linux, windows | 0 |
| 15 | Llama App Free tray app that runs llama.cpp models as one local AI server | Open source | $0 | Developers, Freelancers, Small businesses | windows, macos, linux | 0 |
All 19 tools
1.Supabase
▲ 0Open-source Firebase alternative on Postgres
Open source · $25Developerschecked Oct 20
2.Appsmith
▲ 0Open-source internal tool builder
Open source · $15Developerschecked Oct 20
3.Omnara
▲ 0Open-source platform for running durable AI agents on any model
Open sourceDeveloperschecked Oct 24
4.Overmind
▲ 0Open-source loop that turns AI agent traces into models you own
Open source · $120Developerschecked Oct 28
5.Windmill
▲ 0Open-source developer platform for scripts, flows and apps
Open source · $10Developerschecked Oct 20
6.Backenly
▲ 0Open-source Postgres backend that coding agents build and maintain
Open source · $25Developerschecked Nov 1
7.beacon.sh
▲ 0Open-source memory layer that carries lessons across coding agents
Open sourceDeveloperschecked Nov 3
8.BeeBranch
▲ 0Open-source desktop Git client for GitLab and GitHub teams
Open sourceDeveloperschecked Nov 2
Framework-agnostic TypeScript authentication
Open source · $20Developerschecked Oct 20
Open-source browser agent that cites page quotes for every answer
Open source · $29Developerschecked Oct 31
11.Flagsmith
▲ 0Open-source feature flags and A/B tests, cloud or self-hosted
Open source · $45Developerschecked Oct 22
Deep research reports with every citation checked against source
Open sourceDeveloperschecked Nov 3
13.Insomnia
▲ 0Open-source API client for REST, GraphQL, gRPC and MCP from Kong
Open source · $12Developerschecked Oct 20
14.Inyon
▲ 0Open-source phone and browser remote for terminal coding agents
Open sourceDeveloperschecked Oct 23
15.Llama App
▲ 0Free tray app that runs llama.cpp models as one local AI server
Open sourceDeveloperschecked Oct 26
16.Radar
▲ 0Open-source Kubernetes UI and MCP server for engineers and agents
Open source · $149Developerschecked Oct 30
17.Tessary
▲ 0Open-source monitoring that finds why production AI agents fail
Open sourceDeveloperschecked Oct 22
Open-source platform for durable background jobs and AI agents
Open source · $10Developerschecked Oct 29
Open-source desktop canvas for reviewing coding agent work
Open sourceDeveloperschecked Oct 25