Bifrost vs Respan (2026)
Updated March 10, 2026
vs
Overview
Rating
10.0 / 10
Rating
10.0 / 10
Best For
Engineering teams that want a self-hosted, open-source LLM gateway in their own infrastructure
Best For
AI engineering teams building production LLM applications who need unified access, observability, and cost control
Product Summary
Bifrost is an open-source LLM gateway from Maxim AI, written in Go, that puts 1,000+ models from 20+ providers behind one OpenAI-compatible API.
Product Summary
Respan is the AI router with built-in observability and automated evals: one API for 1,000+ models, with tracing, spend control, and evals on every request.
Starting Price
Free
Starting Price
$0
Free Trial
Yes
Free Trial
Yes
Free Version
Yes
Free Version
Yes
Website
Website
Key features
Core capabilities each platform advertises.
- OpenAI-compatible API for 1,000+ models from 20+ providers
- Automatic failover and load balancing
- Semantic caching
- MCP gateway for tool calls
- One API for 1,000+ models
- Automatic fallbacks and retries
- Load balancing across providers and models
- Exact-match caching with configurable TTL
- Hard spend limits per key, per customer, or org-wide
- Task-aware model routing with Respan Router (beta)
- Tracing, evals, and prompt management on every routed request
Strengths and tradeoffs
What each tool does well, and the limitations to keep in mind.
Pros
- Apache 2.0 license, free to self-host
- 1,000+ models behind one OpenAI-compatible API
- Starts with a single npx command or Docker image
- Semantic caching and MCP gateway included
Cons
- You run, scale, and monitor the gateway yourself
- Observability is exported to other tools rather than stored in the gateway
- Evals live in Maxim's separate platform, priced per seat from $29/month
- Guardrails, SSO, RBAC, and audit logs require Enterprise
Pros
- Gateway, tracing, and evals in one platform, so every metric ties back to the request behind it
- 1,000+ models through one OpenAI-compatible API
- No processing fee on Respan credits, and provider discounts are passed straight through
- Hard spend caps that block requests, not just alert
- Unlimited seats on the free plan
- SOC 2, HIPAA with a BAA, GDPR, and ISO 27001
Cons
- Additional latency (30-40ms) from routing through a gateway layer
- Newer platform with smaller community compared to established tools
- Some advanced provider-specific features may not be fully supported
Bifrost or Respan — which should you choose?
Choose Bifrost if you wantChoose if you want
- Self-hosting an LLM gateway in your own infrastructure
- Failing over between providers during outages
- Cutting repeat-request cost with semantic caching
- Governing tool calls through an MCP gateway
Choose Respan if you wantChoose if you want
- Keeping agents online through provider outages and rate limits
- Controlling LLM spend per customer or API key
- Switching models without code changes
- Scoring output quality on live production traffic
- Replacing a separate gateway, logging tool, and eval tool with one platform