Comparison
forge vs LeanCopilot
Verdict
Pick forge if developers working on self-hosted LLM tooling who need flexibility in backend setup and seamless integration of function calling in multi-step workflows might benefit from Forge; pick LeanCopilot if a system that leverages large language models for theorem proving in the Lean environment.
Markdown twin · forge alternatives · LeanCopilot alternatives
GraphCanon updated 1w
vs
Trust & integrity
| Signal | forge | LeanCopilot |
|---|---|---|
| Maintenance | Very active (0d since push) As of 1w · github_public_v1 | Active (9d since push) As of 4w · github_public_v1 |
| Provenance | Not a fork · Personal account As of 1w · github_public_v1 | Not a fork · Organization account As of 4w · github_public_v1 |
| OSV dependency advisories | No lockfile (source not queried) As of 1mo · osv@v1 | No lockfile (source not queried) As of 1mo · osv@v1 |
| deps.dev advisories | Not queried deps.dev@v1 | Not queried deps.dev@v1 |
| OpenSSF Scorecard | Not queried openssf-scorecard@v1 | Not queried openssf-scorecard@v1 |
Tagline
- forge
- A Python framework for self-hosted LLM tool-calling and multi-step agentic workflows
- LeanCopilot
- LLMs as Copilots for Theorem Proving in Lean
Stars
- forge
- 2.2k
- LeanCopilot
- 1.3k
Forks
- forge
- 173
- LeanCopilot
- 126
Open issues
- forge
- 4
- LeanCopilot
- 5
Language
- forge
- Python
- LeanCopilot
- C++
Adopt for
- forge
- Developers working on self-hosted LLM tooling who need flexibility in backend setup and seamless integration of function calling in multi-step workflows might benefit from Forge.
- LeanCopilot
- A system that leverages large language models for theorem proving in the Lean environment.
Persona
- forge
- -
- LeanCopilot
- -
Runtime
- forge
- -
- LeanCopilot
- -
License
- forge
- MIT
- LeanCopilot
- MIT
Last pushed
- forge
- Aug 13, 2026
- LeanCopilot
- Jul 16, 2026
Categories
- forge
- AI Agents, LLM Frameworks
- LeanCopilot
- AI Agents, LLM Frameworks
Trust and health
Maintenance
- forge
- Very active (96%)
- LeanCopilot
- Active (82%)
Days since push
- forge
- 0d
- LeanCopilot
- 9d
Open issues (now)
- forge
- 4
- LeanCopilot
- 5
Owner type
- forge
- User
- LeanCopilot
- Organization
Full report
- forge
- Trust report
- LeanCopilot
- Trust report
Choose forge if…
- forge is primarily Python; LeanCopilot is C++.
- Requirements: Min 4 GB RAM; Requires Docker; Requires Python 3.12+ and a running LLM backend.; Can be set up with local backends (e.g., llama.cpp) or Anthropic via its API, requiring an API key for the latter case..
- Tags unique to forge: agentic-ai, function-calling, multi-step-workflows, python-framework.
- - You require an agnostic backend setup, such as local LLM backends like llama.cpp or cloud-based services with Anthropic.
When NOT to use forge
- - If your application does not require flexibility in backend selection, and you prefer a single cloud provider like Anthropic without local setup.
- - For scenarios where simplicity of setup outweighs the need for customization in function calling and workflow management.
- - When working within environments strictly regulated against self-hosted infrastructure or requiring fully managed services.
Choose LeanCopilot if…
- LeanCopilot is primarily C++; forge is Python.
- Tags unique to LeanCopilot: formal-mathematics, lean, lean4, llm.
- Need support with formal proof development in Lean or Lean4 specifically
When NOT to use LeanCopilot
- Working exclusively in theorem provers other than Lean or Lean4
- Looking for general-purpose AI programming assistant beyond Lean's domain
Explore
Sources
Every stat on this page traces to a dated GitHub sync, license file, enrichment field, or trust scan.
- GitHub stars (antoinezambelli/forge) · observed Aug 14, 2026
- GitHub forks (antoinezambelli/forge) · observed Aug 14, 2026
- Last push (antoinezambelli/forge) · observed Aug 13, 2026
- License file (MIT) · observed Aug 14, 2026
- Decision facts (enrichment) · observed Jul 17, 2026
- Trust scan (lockfile / OSV) · observed Jul 15, 2026
- GitHub stars (lean-dojo/LeanCopilot) · observed Jul 25, 2026
- GitHub forks (lean-dojo/LeanCopilot) · observed Jul 25, 2026
- Last push (lean-dojo/LeanCopilot) · observed Jul 16, 2026
- License file (MIT) · observed Jul 25, 2026
- Decision facts (enrichment) · observed Jul 17, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
GitHub stars on cards: forge 2.2k · LeanCopilot 1.3k (synced Aug 14, 2026).
Common questions
- What is the difference between forge and LeanCopilot?
- forge: A Python framework for self-hosted LLM tool-calling and multi-step agentic workflows. LeanCopilot: LLMs as Copilots for Theorem Proving in Lean. See the comparison table for live GitHub stats and shared categories.
- When should I choose forge over LeanCopilot?
- Choose forge over LeanCopilot when forge is primarily Python; LeanCopilot is C++; Requirements: Min 4 GB RAM; Requires Docker; Requires Python 3.12+ and a running LLM backend.; Can be set up with local backends (e.g., llama.cpp) or Anthropic via its API, requiring an API key for the latter case.; Tags unique to forge: agentic-ai, function-calling, multi-step-workflows, python-framework; - You require an agnostic backend setup, such as local LLM backends like llama.cpp or cloud-based services with Anthropic.
- When should I choose LeanCopilot over forge?
- Choose LeanCopilot over forge when LeanCopilot is primarily C++; forge is Python; Tags unique to LeanCopilot: formal-mathematics, lean, lean4, llm; Need support with formal proof development in Lean or Lean4 specifically.
- When should I avoid forge?
- - If your application does not require flexibility in backend selection, and you prefer a single cloud provider like Anthropic without local setup. - For scenarios where simplicity of setup outweighs the need for customization in function calling and workflow management. - When working within environments strictly regulated against self-hosted infrastructure or requiring fully managed services.
- When should I avoid LeanCopilot?
- Working exclusively in theorem provers other than Lean or Lean4 Looking for general-purpose AI programming assistant beyond Lean's domain
- Is forge or LeanCopilot more popular on GitHub?
- forge has more GitHub stars (2,217 vs 1,303). Stars measure visibility, not whether either tool fits your constraints.
- Are forge and LeanCopilot open source?
- Yes - both are open-source projects on GitHub (forge: MIT, LeanCopilot: MIT).
- Where can I find alternatives to forge or LeanCopilot?
- GraphCanon lists graph-backed alternatives at forge alternatives and LeanCopilot alternatives (forge markdown twin, LeanCopilot markdown twin), ranked by typed relationship edges rather than popularity votes.
- Is there a machine-readable version of this comparison?
- Yes. The markdown twin at this comparison mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers.
- Which is better maintained, forge or LeanCopilot?
- forge: Very active. LeanCopilot: Active. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance.
- Where are the full trust reports for forge and LeanCopilot?
- GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: forge trust report; LeanCopilot trust report.