Overview
Re_gent and Respan Gateway serve different but complementary roles in the AI development lifecycle. Re_gent is a free, open-source CLI tool that brings version control to AI coding agents, tracking every action, prompt, and file change. Respan Gateway is a production-grade AI gateway that routes API calls to 500+ models with fallback, caching, observability, and cost controls.
Feature Comparison
| Feature | Re_gent | Respan Gateway |
|---|---|---|
| Primary Focus | Version control for AI agent actions | Unified AI gateway for production traffic |
| Target User | Developers using AI coding agents | Engineering teams deploying AI in production |
| Core Functionality | rgt log, rgt blame, rgt sessions | Routing, fallback, caching, spend limits, traces |
| Integration | CLI tool alongside git; supports Claude Code, Codex, OpenCode | OpenAI-compatible API endpoint; works with any SDK |
| Deployment | Local, open-source CLI | Cloud-hosted SaaS (self-hosted possible) |
| Observability | Per-session logs, blame per line, full conversation history | Trace trees, latency spans, metadata filtering |
| Cost Control | Not applicable | Per-key caps, alerts, response caching |
| Compliance | Local-first, no external data transmission | ISO 27001, SOC 2, GDPR, HIPAA |
| Pricing | Free forever (Apache-2.0) | SaaS pricing (usage-based likely) |
Pricing
Re_gent: Free forever under Apache-2.0 license. No paid tiers, no hidden costs. The project is community-driven and open-source.
Respan Gateway: SaaS pricing not publicly listed. Likely usage-based or tiered plans based on number of API calls, models used, and features enabled. A free tier is available for initial evaluation.
Pros and Cons
Re_gent Pros
- Free and open-source (Apache-2.0)
- Provides granular audit trail for AI agent actions
- Works locally without sending data to external servers
- Integrates with popular AI coding tools (Claude Code, Codex, OpenCode)
- Unique 'blame' feature traces every line to its originating prompt
Re_gent Cons
- Limited to AI coding agents; not useful for general AI API management
- Currently in public alpha; may have limited stability or features
- Requires developers to adopt a new CLI tool alongside git
- No built-in cost control or caching for production AI calls
Respan Gateway Pros
- Unified endpoint for 500+ models with fallback and retry logic
- Built-in observability with full traces and metadata filtering
- Cost control with per-key limits, alerts, and response caching
- Enterprise-grade compliance (ISO 27001, SOC 2, GDPR, HIPAA)
- Easy integration with existing OpenAI SDKs
Respan Gateway Cons
- SaaS pricing may be expensive for high-volume usage
- Requires sending all AI traffic through Respan's gateway
- Not focused on agent activity tracking or conversation history
- May introduce latency overhead compared to direct provider calls
Verdict
Choose Re_gent if you're a developer who needs deep visibility into AI coding agent actions, with the ability to undo and trace changes back to specific prompts. Choose Respan Gateway if you're deploying AI features in production and need a reliable, observable, and cost-controlled gateway to multiple models. Both tools complement each other: Re_gent for development-time agent tracking, Respan for production AI traffic management.
Re_gent
Respan Gateway