Of 19 active open-source Harvey AI rivals, only LexPilot documents all four core legal workflows

Asked:“Find all open-source alternatives to Harvey AI on GitHub that were created or actively updated during the last six months. For each, provide name, GitHub URL, date of last update, star count, license, supported jurisdictions, and whether it supports document analysis, case-law research, argument construction, and detection of procedural errors. Exclude abandoned projects and generic chatbots. Present the result as a table with supporting sources.”

A broad scan on 2 September 2026 searched 1,659 unique web results, screened 120 GitHub repository candidates and API-checked 30 finalists, leaving 19 non-archived legal-AI repositories pushed on or after 2 March 2026. The heatmap shows which of four Harvey-style workflows each project documents; stars and last-push dates come from the GitHub API on the scan day.

Documented capability:Yes (explicitly documented)Partial (research stated, case-law corpus unnamed)No (not documented publicly)

LexPilot is the only screened project documenting all four workflows — contract review, legal research, drafting, and FRCP/state deadline calculations. github.com

jurisd (Australia & NZ case law, AGLC4 citation linting) and LawThinker (autonomous judicial retrieval with a procedural-compliance verifier) are the strongest research-and-procedure specialists. github.com · github.com

Mike leads adoption by a wide margin — 4,167 stars, nearly triple runner-up OpenContracts at 1,461 — and was pushed the day of the scan. github.com

Four projects publish code without an explicit OSI license (LQ.AI, Vaquill AI for Word, LexReviewer, Multi-Document Legal Research Assistant), so reuse rights are uncertain. github.com

All 19 repositories — click a header to sort

Data: GitHub REST API snapshot and repository README pages, retrieved 2026-09-02. 1,659 web results searched, 120 candidates screened, 30 finalists API-checked, 19 shown. "Last update" is the API pushed_at date, not the watcher-driven updated_at; stars are a snapshot and can change. Excluded: repositories last pushed before 2026-03-02, generic legal chatbots, curated lists, datasets/model weights, paper-only benchmark code, and closed products. Yes = explicitly documented; Partial = broader feature documented but no named external case-law corpus; No = not publicly documented, not proof of technical impossibility. General compliance or contract-risk review is not counted as procedural-error detection. "All" means all qualifying projects surfaced by this reproducible scan, not a complete registry of GitHub.

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