head to head · open source
bla vs lean-ctx
bla has 5,579 GitHub stars, 681 forks, 0 open issues and last shipped yesterday. lean-ctx has 3,944 stars, 365 forks, 9 open issues and last shipped yesterday. bla leads on adoption by 41% (5,579 vs 3,944 stars). bla is written in TypeScript under MIT; lean-ctx is written in Rust under Apache-2.0. bla has attracted 12% as many forks as stars, lean-ctx 9%. bla was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 3 topic tags (ai-security, claude-code, cursor), 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
| bla | lean-ctx | |
|---|---|---|
| GitHub stars | ★ 5.6K | ★ 3.9K |
| License | MIT | Apache-2.0 |
| Written in | TypeScript | Rust |
| Last push | 2026-11-13 | 2026-11-13 |
| Forks | ⑂ 681 | ⑂ 365 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick bla if
- You weight community size — 5.6K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick lean-ctx if
- You want the lean-ctx feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Rust
- You evaluated both and lean-ctx fits your workflow better
About bla
English · 简体中文 · 繁體中文 · 日本語 · 한국어 · Türkçe · Русский · Tiếng Việt · ไทย · Deutsch · Español · Français · Українська · Polski · Português (Brasil) · العربية · فارسی · Bahasa Indonesia · Italiano · Ελληνικά · മലയാളം · Roman Urdu · Română BLA: Blind LLM Agents Make reverse engineering bankrupt again. Point BLA at the build you ship. When an AI reverse engineering agent (REA) opens it, the analyzer hits resource budgets, follows decoys, and burns tokens — while your users still get the same runtime behavior. Website · Guides · Showcases · Disclaimer Quick start · Empirical results · Format coverage · Benchmark · FAQ…
About lean-ctx
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read the full lean-ctx overview →
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Frequently asked questions
Is bla or lean-ctx more popular?
bla has 5,579 GitHub stars and lean-ctx has 3,944. bla has the larger community by that measure.
Are bla and lean-ctx free?
Both are open source. bla is licensed under MIT and lean-ctx under Apache-2.0. Neither carries a licence fee.
What is the difference between bla and lean-ctx?
bla is written in TypeScript and lean-ctx in Rust. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, bla or lean-ctx?
Choose bla if you want the larger community (5,579 stars) or its MIT licence terms. Choose lean-ctx if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.