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Software Development · head to head

Braintrust vs Datadog Logs

Braintrust logo

Braintrust

Software Development

The active observability platform for agents

From
Free
Rated
-
Full reviewWebsite
Datadog Logs logo

Datadog Logs

Logging

Log Management and Analytics

From
$0.1/per GB ingested per month
Rated
-
Full reviewWebsite

The short version

  • Only Braintrust has a free tier, so it costs nothing to try first.
  • Each has a real cost: Braintrust enterprise plan pricing not published, requires custom quote; Datadog Logs complex, multi-tiered pricing model based on ingestion, indexing, and storage; can become expensive at scale

Where they differ

Only the attributes on which Braintrust and Datadog Logs actually diverge.

Attributes where Braintrust and Datadog Logs differ
AttributeBraintrustDatadog Logs
Starting priceFree$0.1/per GB ingested per month
Pricing modelfreemiumusage-based
Free tierYesNo
PlatformsWebCloud (AWS, Azure, Google Cloud, Oracle Cloud)
CategorySoftware DevelopmentLogging
FoundedUnknown2010

Identical on both: user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Braintrust

Nothing recorded that Datadog Logs does not also cover.

Only in Datadog Logs

  • Log ingestion
  • Full-text search
  • Custom dashboards
  • Log-based metrics
  • API
  • Webhooks
  • REST
  • Web support

What people use each for

The jobs each tool is most often brought in to do.

Braintrust

  • Monitoring production AI agents for qualitynot Datadog Logs
  • Detecting patterns in agent failuresnot Datadog Logs
  • Defining quality expectations before shipping agentsnot Datadog Logs
  • Tracking prompts and tool calls in productionnot Datadog Logs

Datadog Logs

  • Centralised log aggregation and analysisnot Braintrust
  • Multi-source log correlation with metrics and tracesnot Braintrust
  • Root cause analysis and troubleshootingnot Braintrust
  • Security monitoring and threat detectionnot Braintrust

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Braintrust

  • Enterprise plan pricing not published, requires custom quote
  • Pro plan includes 6-12 months free discount for startups only

Datadog Logs

  • Complex, multi-tiered pricing model based on ingestion, indexing, and storage; can become expensive at scale
  • Ingestion pricing of $0.10/GB can accumulate rapidly for high-volume logging environments

Pricing, plan by plan

Braintrust

Free
  • StarterFree
    • $10 model credits monthly included
    • 1 GB processed data monthly
    • 10000 scores monthly
  • Pro$249/month
    • $249 model credits monthly included
    • 5 GB processed data monthly
    • 50000 scores monthly
  • Enterprise$null/month
    • Custom data retention and export capabilities
    • RBAC and premium support
    • On-premises or hosted solutions available

Datadog Logs

$0.1/per GB ingested per month

No published plan breakdown. See the Datadog Logs review.

Which should you pick?

Choose Braintrust if

  • You want to start without paying.
Braintrust review

Choose Datadog Logs if

  • You need log ingestion.
  • You work on Cloud (AWS, Azure, Google Cloud, Oracle Cloud).
  • You also want full-text search.
Datadog Logs review

Questions people ask

Is Braintrust or Datadog Logs better?
Neither clearly leads. Braintrust starts at Free and Datadog Logs at $0.1/per GB ingested per month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Braintrust or Datadog Logs?
Braintrust has a free tier; the other does not. Paid plans start at Free for Braintrust and $0.1/per GB ingested per month for Datadog Logs.
Does Braintrust or Datadog Logs run on more platforms?
Braintrust runs on Web. Datadog Logs runs on Cloud (AWS, Azure, Google Cloud, Oracle Cloud).
Can I use Braintrust for free?
Yes. Braintrust has a free tier, so you can try it without paying. Datadog Logs starts at $0.1/per GB ingested per month.
What is Braintrust best used for?
Braintrust is most often used for monitoring production ai agents for quality, detecting patterns in agent failures, defining quality expectations before shipping agents, tracking prompts and tool calls in production. Of those, monitoring production ai agents for quality and detecting patterns in agent failures are not what Datadog Logs is typically brought in for.
What can Braintrust do that Datadog Logs cannot?
Datadog Logs covers Log ingestion, Full-text search, Custom dashboards, Log-based metrics.

Answered from the vendors’ own pages

Braintrust: Does Braintrust have a free plan?

Braintrust Starter plan is free and includes $10 model credits monthly, 1 GB processed data, 10000 scores monthly, and 14-day data retention with unlimited users and projects. No credit card required.

Source
Datadog Logs: What pricing options does Datadog offer for log ingestion and processing?

Log ingestion starts at $0.10/GB (annual billing; $0.10 on-demand). Standard indexing costs $1.70 per million events per month (annual; $2.55 on-demand). Flex Storage costs $0.05/million events stored per month (annual; $0.075 on-demand). Flex Logs Starter costs $0.60/million events stored per month (annual; $0.90 on-demand).

Source
Braintrust: How much does the Braintrust Pro plan cost?

Braintrust Pro plan costs $249 per month and includes $249 model credits, 5 GB processed data, 50000 scores monthly, and 30-day data retention. Qualifying startups receive 6-12 months free.

Source
Datadog Logs: What retention options are available and how does it affect pricing?

Standard indexing offers 15-day retention with options for 3 to 30+ days. Flex Storage supports flexible retention up to 15 months. Flex Logs Starter includes bundled compute for retention of 3-15 months.

Source
Braintrust: What are Braintrust's overage charges?

Braintrust charges overage rates after monthly allocations: model credits beyond monthly allotment are charged at token rates, data overage is $4 per GB on Starter or $3 per GB on Pro, scores overage is $2.50 per 1000 on Starter or $1.50 per 1000 on Pro. Extended data retention beyond the included period costs $0.50 per GB per month.

Source
Datadog Logs: Is there a cost to forward logs to external systems?

Yes, log forwarding costs $0.25/GB outbound per destination for routing logs to external systems.

Source
Datadog Logs: What discounts are available for high-volume customers?

Multi-year and volume discounts are available for customers processing 3B+ events per month.

Source
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