head to head · open source
openseo vs parlant
openseo has 19,046 GitHub stars, 2,447 forks, 161 open issues and last shipped yesterday. parlant has 18,290 stars, 1,555 forks, 41 open issues and last shipped 2 months ago. openseo leads on adoption by 4% (19,046 vs 18,290 stars). openseo is written in TypeScript under MIT; parlant is written in Python under Apache-2.0. openseo has attracted 13% as many forks as stars, parlant 9%. openseo was the more recently maintained of the two, and both are self-hostable with no licence fee.
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
| openseo | parlant | |
|---|---|---|
| GitHub stars | ★ 19K | ★ 18K |
| License | MIT | Apache-2.0 |
| Written in | TypeScript | Python |
| Last push | 2026-09-17 | 2026-07-12 |
| Forks | ⑂ 2.4K | ⑂ 1.6K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick openseo if
- You weight community size — 19K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- 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 openseo
OpenSEO is an open source SEO tool written in TypeScript under the MIT license. It is an alternative to paid SEO platforms such as Semrush and Ahrefs, and it lives in the open source SEO tooling ecosystem. The project provides a hosted option, self hosting paths, and an MCP server for agent use.
read the full openseo 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 openseo or parlant more popular?
openseo has 19,046 GitHub stars and parlant has 18,290. openseo has the larger community by that measure.
Are openseo and parlant free?
Both are open source. openseo is licensed under MIT and parlant under Apache-2.0. Neither carries a licence fee.
What is the difference between openseo and parlant?
openseo is written in TypeScript 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, openseo or parlant?
Choose openseo if you want the larger community (19,046 stars) or its MIT licence terms. Choose parlant if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.