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Head to head · 2026

Braintrust vs Respan

Pricing, free plans, ratings, features, pros and cons, side by side. Where one comes out ahead, we mark it.

Braintrust

Raised an ICONIQ-led $80M Series B building the evaluation layer teams use to ship AI products…

4.2$249/mo

Visit Braintrust (opens Braintrust in a new tab)

Respan

One endpoint to 1,000 models, with tracing, evaluation and alerting behind it

4.1Free

Visit Respan (opens Respan in a new tab)

Who comes out ahead

Based only on the facts in our directory. The right pick still depends on the job you need done.

  • Lower starting price

    Not comparable

    Not comparable: Respan does not list a price

  • Free plan

    Tie

    Both have one

  • Higher rating

    Braintrust

    4.2 against 4.1

  • Same job?

    Yes

    Both are AI Infrastructure & Agent Tooling tools

Side by side

Compared onBraintrustRespan
Our rating4.2Better4.1
Starts at$249/moFree
Free planYesYes
CategoryAI Infrastructure & Agent ToolingAI Infrastructure & Agent Tooling
PlansFrom $249/moFree
Key features
  • Evaluation-first platform, not just logging and tracing after the fact
  • Lets teams test and score AI product behavior before shipping
  • Tracing priced per GB for production observability
  • $80M Series B led by ICONIQ Capital in February 2026
  • Backed by Andreessen Horowitz, Greylock, and Elad Gil
  • Single gateway endpoint to 1,000-plus models
  • Automatic fallbacks and response caching
  • Tracing of every call, tool run and agent action
  • Evaluations by LLM judge, deterministic check or human review
  • Cost, latency and token monitoring with alerts
Pros
  • Evaluation-first approach catches failures a pure logging tool would only surface after the fact
  • Strong-name investor backing signals real staying power in a crowded observability market
  • Simple two-tier pricing is easier to reason about than usage-based competitors with many tiers
  • Automatic fallback keeps an app up through a provider outage
  • Routing, tracing and evaluation in one layer rather than three
  • Free to start
Cons
  • Jump from free straight to $249/month with no mid-tier option limits gradual scaling
  • Per-GB tracing costs require monitoring at high production volume
  • Newer entrant competing against more established observability platforms like Arize and LangSmith
  • No published pricing tiers for production volume
  • A gateway adds a hop and a dependency to every request
  • LLM-judge evaluation inherits the judging model's biases
CompanyBraintrust, founded 2023Keywords AI, Inc.

Prices come from each vendor's pricing page, last checked 20260814. Check the vendor before you buy.

FAQ

Questions people ask

Is Braintrust better than Respan?

In our reviews Braintrust scores 4.2 and Respan scores 4.1. The better pick depends on the job. Braintrust: Raised an ICONIQ-led $80M Series B building the evaluation layer teams use to ship AI products with confidence. Respan: One endpoint to 1,000 models, with tracing, evaluation and alerting behind it.

Which is cheaper, Braintrust or Respan?

Braintrust: from $249/mo. Respan: free.

Do Braintrust and Respan have free plans?

Yes, both have a free plan.

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