Respan (formerly Keywords AI)
Respan (formerly Keywords AI) is an AI gateway with tools for observing, evaluating, and security testing AI systems.
What Respan (formerly Keywords AI) is
Respan (formerly Keywords AI) is an AI gateway with tools for observing, evaluating, and security testing AI systems. Its OpenAI-compatible gateway routes requests to 1,000+ models through one endpoint and includes fallbacks, load balancing, automatic retries, and response caching. The gateway may add 50 to 150 ms of latency, which may matter for products with strict latency requirements. Respan records LLM calls, tool runs, retrievals, and agent turns as trace spans, including input, output, latency, and cost. Teams can evaluate sampled production traffic using LLM judges, code checks, and human review. Monitoring covers requests, errors, cost, latency, and tokens, with threshold alerts through Slack, email, or webhook. Its directory lists 171 integrations, including OpenTelemetry, LangChain, OpenAI, Anthropic, AWS Bedrock, Slack, and PostHog. Respan lists API, self-hosted, and web platforms. The Free plan is free; Team is $199 a year, billed yearly. Enterprise pricing is custom.
Good
- Routes requests to 1,000+ models through one endpoint.
- Records calls, tool runs, retrievals, and agent turns.
- Evaluates sampled production traffic.
- Tracks cost, latency, errors, and tokens.
- Threshold alerts can go to Slack, email, or webhook.
Watch out
- Gateway may add 50 to 150 ms latency.
- Team plan is billed yearly.
- Enterprise pricing is custom.
Who it suits
Respan suits startup and enterprise teams that need to trace AI workflows, assess agent behavior, or monitor quality in production. Its listed self-hosted deployment and enterprise security options may suit teams with those requirements.
Verdict
Respan brings model routing together with tracing, evaluations, and monitoring. Its added gateway latency is worth weighing for applications with strict response-time requirements.
Plans and prices
From Respan (formerly Keywords AI)'s own pricing page, checked 4 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | 100k logs · 1k scores · 5 datasets · 2 evaluators · 5 prompts |
| Team | $199 a year | 10k scores · 100k logs · unlimited datasets, evaluators, and prompts · 5 members · Billed yearly |
| Enterprise | Priced on request | Custom packages · volume discount · custom SLAs · dedicated support engineer · HIPAA BAA |
The facts
Each one read from Respan (formerly Keywords AI)'s own pages, with the date it was checked.
The company
- Company background
- The About page says Respan, formerly Keywords AI, began at the University of Illinois and joined Y Combinator's Winter 2024 batch.checked 4 Oct 2026
What it does
- Enterprise security
- The Enterprise plan lists self-hosted deployment, Google and SAML SSO, HIPAA compliance, and a HIPAA BAA.checked 4 Oct 2026
- Evaluations
- Evaluators can combine LLM judges, deterministic code checks, and human review, and can score sampled production traffic.checked 4 Oct 2026
- Gateway
- Its OpenAI-compatible gateway routes requests to 1,000+ models through one endpoint.checked 4 Oct 2026
- Gateway latency
- The gateway quickstart says the gateway may add 50 to 150 ms and may not suit products with strict latency requirements.checked 4 Oct 2026
- Integrations
- The integrations directory lists 171 integrations, including OpenTelemetry, LangChain, OpenAI, Anthropic, AWS Bedrock, Slack, and PostHog.checked 4 Oct 2026
- Intended users
- The About page says Respan helps teams trace workflows, evaluate agent behavior, and improve quality in production, and that startups and enterprise teams use it.checked 4 Oct 2026
- Monitoring
- The product tracks requests, errors, cost, latency, and tokens, with threshold alerts sent through Slack, email, or webhook.checked 4 Oct 2026
- Privacy and compliance
- The homepage states Respan supports SOC 2, GDPR, and HIPAA, and says a BAA is available for healthcare teams.checked 4 Oct 2026
- Product
- Respan describes itself as an AI gateway with built-in observability, evaluations, and security testing.checked 4 Oct 2026
- Reliability
- The gateway provides model fallbacks, load balancing, automatic retries, and response caching.checked 4 Oct 2026
- Support
- The pricing page lists Community Discord for Free, email support for Team, and a dedicated support engineer for Enterprise.checked 4 Oct 2026
- Tracing
- Respan captures LLM calls, tool runs, retrievals, and agent turns as spans in a trace with input, output, latency, and cost.checked 4 Oct 2026
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