Refact.ai
Open-source AI coding agent with autocomplete, chat and agentic RAG that can be self-hosted on-premise or used as a cloud service.
Delv Safety Grade: B
Score 72/100 · assessed 2026-04-18
Refact.ai is an open-source coding assistant from Small Magellanic Cloud AI, a smaller vendor without the track record of major tech firms. The project offers both self-hosted and cloud deployment options, providing transparency through its GitHub repository with active development and documentation. As a coding agent with agentic RAG capabilities, it requires substantial permissions including filesystem access for reading and modifying code, network access for cloud features or self-hosted inference, and likely shell execution for build tasks. The supply chain is reasonably solid with distribution through IDE marketplaces, though the smaller maintainer base presents some bus factor risk. No security incidents are known. The self-hosting option is a positive for organisations with strict data residency requirements, but the broad permissions needed for agentic coding tasks warrant careful scoping in production environments.
Green flags
- Fully open source with active GitHub repository and documentation
- Self-hosting option available for data sovereignty
- Available through official IDE marketplaces (VSCode, JetBrains)
- Transparent about both free and paid tiers
- No known security incidents or CVEs
Red flags
- Smaller vendor with limited track record compared to established players
- Agentic capabilities imply broad filesystem and execution permissions
- Bus factor risk with smaller maintainer team
- Cloud service option requires sending code to external servers
Permissions requested
Pricing
Platforms
Review
Pay for the cloud tier if you want a Copilot alternative with better Python/Rust support and don't mind slightly rougher edges. Pay for the enterprise self-hosted version if compliance demands it. Skip it if you're already happy with Cursor or need cutting-edge agentic behaviour.
Good at
- Self-hosted option for regulated industries where code cannot leave infrastructure
- Fine-tuned models perform well on Python and Rust, often better than generic alternatives
- Agentic RAG indexes your codebase and handles multi-file refactors with less manual intervention
- Open-source core means you can audit and extend it
- Freemium tier lets you test before committing to paid plans
Watch out
- Agentic mode still requires manual review of each change, not meaningfully more autonomous than competitors
- Occasionally hallucinates imports or gets stuck in loops with circular dependencies
- Indexing struggles with monorepos over 500k lines
- Cloud models are competent but not state-of-the-art compared to GPT-4 or Claude
- Less polished UX and slower iteration speed than Cursor
Use cases
- self-hosted coding
- autocomplete
- agentic tasks