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About Respan
What does Respan do?
Respan is an LLM engineering platform that helps developers route, observe, and evaluate every LLM call in one place. It provides a unified endpoint to reach 1,000+ models across major providers, with automatic fallbacks, response caching, spend limits, and detailed tracing.
Problem it solves
Respan solves the complexity of managing multiple AI models and providers—reducing downtime with fallback routing, cutting costs with caching, and providing observability to track performance and spend. It also includes evaluation tools to test outputs before shipping.
Who is it for?
Respan is ideal for startups and growing teams that build LLM-based applications and need reliability, cost control, and evaluation. It is not for non-technical users or those looking for a no-code AI builder.
Real use cases
Use Respan to route traffic to fallback models automatically, cache repeat requests to save on API costs, set spend limits per key or customer, and run evaluations on production traffic to compare model or prompt versions.
Key features
- Unified AI Gateway — Reach 1,000+ models through one endpoint, with fallbacks and caching.
- Observability — Trace every LLM call, monitor spend, and use OpenTelemetry support.
- Evaluations — Score outputs with LLM-as-judge, code checks, or human review on production data.
- Spend Management — Set budgets and rate limits at key, customer, or org level.
- Prompt Management — Collaborative IDE, version control, and one-click deployment.
- Data Control — PII masking, custom retention, and SOC 2/HIPAA compliance options.
SaaSpartout Score
7.6
/10
Editorial score from our review methodology — not user ratings.
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Respan Pricing
Respan pricing: from $0/mo.
For comparison: the median starting price in Developer Tools is $19.99/month, measured across 301 tools we track. See the full SaaS Pricing Index →
Free
$0 per month — includes full platform, 100k logs, 1k scores, 5 datasets, 2 evaluators, and 5 prompts.
Team
$199 per month (billed yearly) — includes everything in Free, plus unlimited datasets, evaluators, prompts, private Slack channel, and SOC 2 report.
Enterprise
Contact sales — includes custom packages, volume discounts, custom SLAs, dedicated support engineer, and HIPAA BAA.
Respan offers a free plan with no credit card required.
Frequently asked questions
Is Respan free to use?
Yes, Respan offers a free plan that includes 100k logs, 1k scores, 5 datasets, 2 evaluators, and 5 prompts, with no credit card required.
How much does Respan cost?
Respan's paid plans start at $199 per month (billed yearly) for the Team plan. Enterprise pricing is available on request.
What is Respan used for?
Respan is an LLM engineering platform used to route, observe, and evaluate LLM calls. It helps developers manage multiple models, reduce downtime, and control costs.
Who is Respan best for?
Respan is best for startups and growing teams that build LLM-based applications and need reliability, observability, and evaluation capabilities.
What are top alternatives to Respan?
Alternatives include LangSmith, Helicone, and Portkey—all offering LLM observability and gateway features. Respan differentiates with built-in evals and caching.
Does Respan support self-hosting?
Yes, the Enterprise plan offers self-hosted deployment options, along with SSO (SAML) and HIPAA compliance.
