---
title: "Braintrust vs OpenTelemetry: Which is Better in 2026? | App Stack Builder"
description: "Braintrust vs OpenTelemetry compared for 2026 — pricing, free tiers, features, pros & cons. See which llm observability & evals tool is the better fit for your startup."
source: https://appstackbuilder.com/compare/braintrust-vs-opentelemetry
retrieved: 2026-10-07
---

![](https://www.google.com/s2/favicons?domain=braintrust.dev&sz=128)

vs

![](https://www.google.com/s2/favicons?domain=opentelemetry.io&sz=128)

# Braintrust vs OpenTelemetry: Which is Better in 2026?

LLM Observability & Evals

Choosing between [Braintrust](https://appstackbuilder.com/tools/braintrust) and [OpenTelemetry](https://appstackbuilder.com/tools/opentelemetry)? Both are popular llm observability & evals tools. Below we compare them on pricing, free tiers, features, and pros & cons so you can pick the right fit for your stack.

Quick verdict

Both Braintrust and OpenTelemetry are strong llm observability & evals choices. The right pick comes down to your specific feature needs, existing stack, and team preferences.

## Braintrust vs OpenTelemetry — Side by Side

|                | Braintrust                             | OpenTelemetry                                      |
| -------------- | -------------------------------------- | -------------------------------------------------- |
| Category       | LLM Observability & Evals              | LLM Observability & Evals                          |
| Pricing        | Free · paid from $249/mo               | Free                                               |
| Starting price | Free tier available                    | Free tier available                                |
| Free tier      | ✓                                      | ✓                                                  |
| Rating         | 4.6                                    | 4.6                                                |
| Best for       | LLM Observability & Evals — llm, evals | LLM Observability & Evals — observability, tracing |

## Pros & Cons

![](https://www.google.com/s2/favicons?domain=braintrust.dev&sz=128)

[Braintrust](https://appstackbuilder.com/tools/braintrust)

* ✓Strongest eval and experiment workflow in the category
* ✓Unlimited users, so PMs and domain experts can review outputs
* ✓Generous startup program
* ✗$0 to $249 is a steep step with nothing in between
* ✗Closed source, and only Enterprise can self-host
* ✗Short default retention on both self-serve plans

![](https://www.google.com/s2/favicons?domain=opentelemetry.io&sz=128)

[OpenTelemetry](https://appstackbuilder.com/tools/opentelemetry)

* ✓No vendor lock-in: switch backends without re-instrumenting
* ✓One trace spans your API, database and model calls
* ✓Every serious observability vendor accepts OTLP
* ✓Apache 2.0 licensed, CNCF governed
* ✗No UI, evals or prompt management of its own
* ✗You still have to pick and pay for (or run) a backend
* ✗GenAI conventions are still evolving, so attribute names can shift

## Key Features Compared

### Braintrust

* ✓5 GB processed data (+$3/GB)
* ✓50k scores (+$1.50 / 1k)
* ✓30-day retention
* ✓Unlimited users
* ✓6–12 months free for qualifying startups

### OpenTelemetry

* ✓SDKs for every major language
* ✓OpenTelemetry Collector for routing and sampling
* ✓GenAI semantic conventions for LLM, agent and MCP spans
* ✓Export to any OTLP-compatible backend

### Choose Braintrust if…

* ✓You want a free tier to validate before paying.
* ✓Strongest eval and experiment workflow in the category
* ✓Unlimited users, so PMs and domain experts can review outputs
* ✓Generous startup program
[Braintrust review & pricing ](https://appstackbuilder.com/tools/braintrust)

### Choose OpenTelemetry if…

* ✓You want a free tier to validate before paying.
* ✓No vendor lock-in: switch backends without re-instrumenting
* ✓One trace spans your API, database and model calls
* ✓Every serious observability vendor accepts OTLP
[OpenTelemetry review & pricing ](https://appstackbuilder.com/tools/opentelemetry)

## Frequently Asked Questions

Is Braintrust better than OpenTelemetry?⌄

Both Braintrust and OpenTelemetry are strong llm observability & evals choices. The right pick comes down to your specific feature needs, existing stack, and team preferences.

What is the difference between Braintrust and OpenTelemetry?⌄

Braintrust — Eval-first AI observability with unlimited users on every plan. It is priced on data processed and scores run, not seats. OpenTelemetry — The vendor-neutral standard for traces, metrics and logs, with GenAI conventions that describe LLM calls, agents and MCP in one shared schema. Both are llm observability & evals tools; the comparison table above breaks down pricing, free tiers, and what each is best for.

Braintrust vs OpenTelemetry: which is cheaper?⌄

Braintrust pricing: Free · paid from $249/mo. OpenTelemetry pricing: Free. Confirm current pricing on each tool's official site, as plans change.

Which is rated higher, Braintrust or OpenTelemetry?⌄

In our catalog, Braintrust rates 4.6 out of 5 and OpenTelemetry rates 4.6 out of 5 — they are evenly matched.

See more options in our guide to the [best llm observability & evals tools for startups](https://appstackbuilder.com/categories/llm-observability).

## Still not sure which to pick?

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