head to head · open source
OpenBB vs parlant
OpenBB has 73,153 GitHub stars, 7,565 forks, 117 open issues and last shipped yesterday. parlant has 18,290 stars, 1,555 forks, 41 open issues and last shipped 2 months ago. OpenBB leads on adoption by 300% (73,153 vs 18,290 stars). OpenBB is written in Python under a custom or non-standard licence; parlant is written in Python under Apache-2.0. OpenBB has attracted 10% as many forks as stars, parlant 9%. OpenBB was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (python), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| OpenBB | parlant | |
|---|---|---|
| GitHub stars | ★ 73K | ★ 18K |
| License | Custom / other | Apache-2.0 |
| Written in | Python | Python |
| Last push | 2026-09-17 | 2026-07-12 |
| Forks | ⑂ 7.6K | ⑂ 1.6K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick OpenBB if
- You weight community size — 73K stars and counting
- You want the Custom / other license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick parlant if
- You want the parlant feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Python
- You evaluated both and parlant fits your workflow better
About OpenBB
OpenBB is an open source data platform for investment professionals, built as the Open Data Platform (ODP) and extended by the OpenBB Workspace UI. It lives in the quantitative finance and AI agent ecosystem, integrating equity, crypto, derivatives, fixed income, economics, and options data from proprietary, licensed, and public sources.
read the full OpenBB overview →
About parlant
Parlant is a Python project licensed under Apache 2.0, and it presents itself as an interaction control harness for customer facing AI agents. It lives in the open source large language model ecosystem, with topic tags for ai agents, llm, openai, gemini, llama3, genai, python, customer service, customer success, and ai alignment. The README describes a server based Python SDK for creating agents, observations, and guidelines.
read the full parlant overview →
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Frequently asked questions
Is OpenBB or parlant more popular?
OpenBB has 73,153 GitHub stars and parlant has 18,290. OpenBB has the larger community by that measure.
Are OpenBB and parlant free?
Both are open source. OpenBB has no licence declared in this registry, and parlant is licensed under Apache-2.0. Both are free to self-host.
What is the difference between OpenBB and parlant?
OpenBB is written in Python and parlant in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, OpenBB or parlant?
Choose OpenBB if you want the larger community (73,153 stars) or its Custom / other licence terms. Choose parlant if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.