head to head · open source
parlant vs lemo-opuscar
parlant has 18,318 GitHub stars, 1,553 forks, 41 open issues and last shipped yesterday. lemo-opuscar has 11,059 stars, 1,273 forks, 0 open issues and last shipped 3 days ago. parlant leads on adoption by 66% (18,318 vs 11,059 stars). parlant is written in Python under Apache-2.0; lemo-opuscar is written in JavaScript under MIT. parlant has attracted 8% as many forks as stars, lemo-opuscar 12%. parlant 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
| parlant | lemo-opuscar | |
|---|---|---|
| GitHub stars | ★ 18K | ★ 11K |
| License | Apache-2.0 | MIT |
| Written in | Python | JavaScript |
| Last push | 2026-11-02 | 2026-10-31 |
| Forks | ⑂ 1.6K | ⑂ 1.3K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick parlant if
- You weight community size — 18K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick lemo-opuscar if
- You want the lemo-opuscar feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches JavaScript
- You evaluated both and lemo-opuscar fits your workflow better
About parlant
The interaction control harness for customer facing AI agents Website • Quick Start • Examples • Discord Deutsch Español français 日本語 한국어 Português Русский 中文 Looking for an open source alternative to Ada, Decagon, or Sierra? Parlant is production ready. It streamlines the development and maintenance of enterprise grade B2C (business to consumer) and sensitive B2B interactions that need to be consistent, compliant, on brand, and comprehensively traceable. Why Parlant? Conversational context engineering is hard because real world interactions are diverse, nuanced, and non linear. ❌ The Problem…
read the full parlant overview →
About lemo-opuscar
Lemo Opuscar English · 简体中文 43 film styles, each with a short film made entirely in code. 43 种影片风格，每种都配一支完全用代码做出来的短片。 Pick a style, bring your own story, and let your coding agent direct the film. 选一个风格，带上你自己的故事，让你的编程 agent 来当导演。 🇨🇳 中文用户请看这里 → 简体中文说明 README.zh CN.md ▶ Watch the gallery Official repo: github.com/lemomo ai/lemo opuscar · by Lemomo (@lemomo ai) New: all 98 styles of OPUSCAR 98 : for every film, its style (2D or 3D), a frame, a style prompt you can reuse, and how its shots were directed. 🎬 Feature presentation: OPUSCAR 98 98 Years of Best Picture · 1927 – 2025 · 6:31 One Clawd walks through all…
read the full lemo-opuscar overview →
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Frequently asked questions
Is parlant or lemo-opuscar more popular?
parlant has 18,318 GitHub stars and lemo-opuscar has 11,059. parlant has the larger community by that measure.
Are parlant and lemo-opuscar free?
Both are open source. parlant is licensed under Apache-2.0 and lemo-opuscar under MIT. Neither carries a licence fee.
What is the difference between parlant and lemo-opuscar?
parlant is written in Python and lemo-opuscar in JavaScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, parlant or lemo-opuscar?
Choose parlant if you want the larger community (18,318 stars) or its Apache-2.0 licence terms. Choose lemo-opuscar if its feature set, stack or MIT licence fits better. Both are self-hostable.