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Galileo alternatives: 6 apps ranked by verified data

Facts checked Nov 8, 2026AppBreakup editorialHow we rankAll LLM observability tools

Top picks

Common reasons people leave Galileo: now sold through Splunk with annual billing, heavier to buy than self-serve rivals, and not open source. We ranked 6 alternatives by how directly each one replaces Galileo, then by reviews, real visits and how recently each app's facts were checked against its own website. Braintrust currently ranks first.

Galileo has been acquired. Galileo's documentation says that as of 7 August 2026 Galileo is now Splunk Agent Observability.

Quick comparison

#AppPricingVerified priceOpen sourcePlatformsVerified factsScore
1Braintrust logoBraintrustFree plan + paid$249/month (Pro)NoWeb5 of 568.8
2HoneyHive logoHoneyHiveFree plan + paid—NoWeb, Self-hosted5 of 564.8
3Datadog logoDatadogFree plan + paidInfrastructure Pro, $15 per host/month billed annuallyNoWeb, iOS, Android6 of 764.7
4Traceloop logoTraceloopFree plan + paid—NoWeb, Self-hosted7 of 761.8
5Evidently AI logoEvidently AIOpen source—YesSelf-hosted, Web4 of 457.5
6Fiddler AI logoFiddler AIFree plan + paid$0.002 per traceNoWeb, Self-hosted4 of 455.9
  1. Braintrust logo

    1. BraintrustTop pick

    Best for: AI product teams that treat evals as the main gate before shipping prompt and model changes

    Free plan + paidWeb

    68.8

    score / 100

    Why switch from Galileo

    Independent, self-serve eval platform with a free plan and published Pro pricing.

    Pros

    • Unlimited users and projects even on the free plan
    • Strong eval workflow: datasets, scorers and experiment comparison
    • SDKs in many languages, plus OpenTelemetry support
    • Startup programme with months of Pro for free

    Cons

    • Free plan keeps data for only 14 days
    • Big jump from the free tier to the Pro plan price
    • SAML SSO and self-hosting are Enterprise-only
    • Core platform is not open source, unlike some rivals
    Visit Braintrust Details and reviews
    How this score is calculated
    Editorial fit ×0.3100
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Braintrust a good Galileo alternative?

    Verified facts

    5 of 5 verified
    Free plan
    Starter, $0/month
    Checked Nov 8, 2026braintrust.dev(opens source in a new tab)
    Starting price
    $249/month (Pro)
    Checked Nov 8, 2026braintrust.dev(opens source in a new tab)
    Users
    Unlimited on every plan
    Checked Nov 8, 2026braintrust.dev(opens source in a new tab)
    Free data retention
    14 days
    Checked Nov 8, 2026braintrust.dev(opens source in a new tab)
    SDKs
    Python, TypeScript, Go, Ruby, C# and more
    Checked Nov 8, 2026braintrust.dev(opens source in a new tab)
  2. HoneyHive logo

    2. HoneyHive

    Best for: Enterprises in regulated sectors that need agent tracing and evals with self-hosting options

    Free plan + paidWeb, Self-hosted

    64.8

    score / 100

    Why switch from Galileo

    Free tier plus self-hosted and hybrid Enterprise options, without buying through Splunk.

    Pros

    • Free plan with full observability and evaluation features
    • OpenTelemetry-native SDKs with auto-instrumentation for many frameworks
    • Self-hosted, hybrid and single-tenant deployment on Enterprise
    • SOC 2 Type II, GDPR and HIPAA compliance

    Cons

    • Free plan is limited to 10,000 events and five users
    • No published mid-tier plan between free and Enterprise
    • Hosted free tier only stores data in one US region
    Visit HoneyHive Details and reviews
    How this score is calculated
    Editorial fit ×0.387
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is HoneyHive a good Galileo alternative?

    Verified facts

    5 of 5 verified
    Free plan
    10,000 events/month
    Checked Nov 8, 2026honeyhive.ai(opens source in a new tab)
    Free plan users
    Up to 5
    Checked Nov 8, 2026honeyhive.ai(opens source in a new tab)
    Self-hosting
    Enterprise plan
    Checked Nov 8, 2026honeyhive.ai(opens source in a new tab)
    Compliance
    SOC 2 Type II, GDPR, HIPAA
    Checked Nov 8, 2026honeyhive.ai(opens source in a new tab)
    SDKs
    Python and TypeScript, OpenTelemetry
    Checked Nov 8, 2026honeyhive.ai(opens source in a new tab)
  3. Datadog logo

    3. Datadog

    Best for: Cloud-heavy teams that want metrics, traces, logs and alerts in one hosted product and can budget for it

    Free plan + paidWeb, iOS, Android

    64.7

    score / 100

    Why switch from Galileo

    LLM monitoring in the same place as infrastructure and APM for teams on Datadog rather than Splunk.

    Pros

    • Very wide integration catalogue that works with little setup
    • Metrics, traces and logs are linked in one interface
    • Mature dashboards, monitors and on-call features

    Cons

    • Per-product, per-host pricing makes bills hard to forecast
    • Custom metrics and log volume get expensive quickly
    • No self-hosted option
    Visit Datadog Details and reviews
    How this score is calculated
    Editorial fit ×0.341
    Reviews ×0.363
    Clicks (90 days) ×0.15100
    Freshness ×0.1590
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Datadog a good Galileo alternative?

    Verified facts

    6 of 7 verified
    Starting price
    Infrastructure Pro, $15 per host/month billed annually
    Checked Nov 8, 2026datadoghq.com(opens source in a new tab)
    Free tier
    Up to 5 hosts, 1-day metric retention
    Source changed Nov 8, 2026datadoghq.com(opens source in a new tab)
    Free trial
    14 days
    Checked Nov 8, 2026datadoghq.com(opens source in a new tab)
    Integrations
    1,000+
    Checked Nov 8, 2026datadoghq.com(opens source in a new tab)
    Enterprise plan
    $23 per host/month billed annually
    Checked Nov 8, 2026datadoghq.com(opens source in a new tab)
    APM plan
    From $31 per host/month
    Checked Nov 8, 2026datadoghq.com(opens source in a new tab)
    Free plan
    Yes, up to 5 hosts with 1-day metric retention
    Checked Nov 8, 2026datadoghq.com(opens source in a new tab)
  4. Traceloop logo

    4. TraceloopAcquired

    Best for: Teams that want vendor-neutral OpenTelemetry tracing for LLM apps, including air-gapped setups

    Free plan + paidWeb, Self-hosted

    61.8

    score / 100

    Why switch from Galileo

    Open-source OpenTelemetry SDK and built-in quality checks with a free plan.

    Pros

    • Open-source OpenLLMetry SDK works with many observability backends
    • Generous free plan of 50,000 spans a month
    • On-prem and air-gapped deployment for Enterprise
    • SDKs for Python, TypeScript, Go and Ruby

    Cons

    • Free plan keeps data for only 24 hours
    • Joining ServiceNow adds uncertainty about the standalone product
    • No published price between free and Enterprise
    Visit Traceloop Details and reviews
    How this score is calculated
    Editorial fit ×0.377
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Traceloop a good Galileo alternative?

    Verified facts

    7 of 7 verified
    Status
    Joining ServiceNow
    Checked Nov 8, 2026traceloop.com(opens source in a new tab)
    Free plan
    Yes, $0/month up to 50K spans and 5 seats
    Checked Nov 8, 2026traceloop.com(opens source in a new tab)
    SDK license
    Apache-2.0
    Checked Nov 8, 2026github.com(opens source in a new tab)
    Self-hosting
    On-prem and air-gapped
    Checked Nov 8, 2026traceloop.com(opens source in a new tab)
    Languages
    Python, TypeScript, Go, Ruby
    Checked Nov 8, 2026traceloop.com(opens source in a new tab)
    Enterprise plan
    Custom pricing for over 50K spans/month
    Checked Nov 8, 2026traceloop.com(opens source in a new tab)
    Free trial
    14 days
    Checked Nov 8, 2026traceloop.com(opens source in a new tab)
  5. Evidently AI logo

    5. Evidently AI

    Best for: ML and data teams who want code-first LLM evals and model drift monitoring on their own infrastructure

    Open sourceSelf-hostableSelf-hosted, Web

    57.5

    score / 100

    Why switch from Galileo

    Open-source library and platform for LLM evals and monitoring, for teams that want to self-host their evaluation stack.

    Pros

    • Apache 2.0 licensed, with no paid tier needed for the core features
    • Covers both classic ML drift monitoring and LLM and agent evaluation
    • Over 100 built-in metrics, plus custom checks and LLM-as-judge
    • Evaluations run as tests, so they slot into CI pipelines

    Cons

    • Code-first Python library, so non-engineers will struggle to set up checks
    • You run and maintain the self-hosted platform yourself
    • Lighter on prompt management and production tracing than LLM-first tools
    Visit Evidently AI Details and reviews
    How this score is calculated
    Editorial fit ×0.363
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Evidently AI a good Galileo alternative?

    Verified facts

    4 of 4 verified
    License
    Apache 2.0
    Checked Nov 8, 2026github.com(opens source in a new tab)
    Built-in metrics
    100+
    Checked Nov 8, 2026evidentlyai.com(opens source in a new tab)
    Self-hosting
    Yes
    Checked Nov 8, 2026docs.evidentlyai.com(opens source in a new tab)
    Covers
    LLMs, RAG, agents and ML models
    Checked Nov 8, 2026evidentlyai.com(opens source in a new tab)
  6. Fiddler AI logo

    6. Fiddler AI

    Best for: Regulated enterprises that need agent observability, guardrails and AI governance in one platform

    Free plan + paidWeb, Self-hosted

    55.9

    score / 100

    Why switch from Galileo

    Enterprise model monitoring covering both classic ML and LLMs, with guardrails and explainability in one platform.

    Pros

    • Monitors both predictive ML models and LLM agents in one place
    • Guardrails run on its own models, so checks don't add outside LLM API costs
    • Can be deployed as SaaS, in your VPC or on-premises
    • Governance and compliance features aimed at regulated industries

    Cons

    • Free plan covers guardrails only, not full observability
    • Not open source, unlike Evidently or Langfuse
    • Enterprise features and on-prem deployment need a sales contract
    Visit Fiddler AI Details and reviews
    How this score is calculated
    Editorial fit ×0.357
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Fiddler AI a good Galileo alternative?

    Verified facts

    4 of 4 verified
    Free plan
    Real-time guardrails
    Checked Nov 8, 2026fiddler.ai(opens source in a new tab)
    Developer plan
    $0.002 per trace
    Checked Nov 8, 2026fiddler.ai(opens source in a new tab)
    Deployment
    SaaS, VPC or on-premise
    Checked Nov 8, 2026fiddler.ai(opens source in a new tab)
    Guardrail latency
    Under 80 ms
    Checked Nov 8, 2026fiddler.ai(opens source in a new tab)

The best Galileo alternative for…

The highest-ranked app in this list for each need.

Braintrust logo

Best Galileo alternative for most people

Braintrust

Independent, self-serve eval platform with a free plan and published Pro pricing.

Evidently AI logo

Best Galileo alternative for a free option

Evidently AI

Open-source library and platform for LLM evals and monitoring, for teams that want to self-host their evaluation stack.

HoneyHive logo

Best Galileo alternative for a free plan you can upgrade

HoneyHive

Free tier plus self-hosted and hybrid Enterprise options, without buying through Splunk.

Evidently AI logo

Best Galileo alternative for open source

Evidently AI

Open-source library and platform for LLM evals and monitoring, for teams that want to self-host their evaluation stack.

Evidently AI logo

Best Galileo alternative for self-hosting

Evidently AI

Open-source library and platform for LLM evals and monitoring, for teams that want to self-host their evaluation stack.

Datadog logo

Best Galileo alternative for iPhone and Android

Datadog

LLM monitoring in the same place as infrastructure and APM for teams on Datadog rather than Splunk.

Traceloop logo

Best Galileo alternative for working in the browser

Traceloop

Open-source OpenTelemetry SDK and built-in quality checks with a free plan.

Galileo alternatives: common questions

What is the best alternative to Galileo?

Braintrust ranks first right now. Independent, self-serve eval platform with a free plan and published Pro pricing. HoneyHive and Datadog follow it in our ranking.

Galileo vs Braintrust: what's the difference?

Galileo is a paid product; Braintrust is free with paid plans. Verified prices: Galileo $100/month per 1.2M spans, billed annually, Braintrust $249/month (Pro). Both run on Web.

Is Galileo free?

Galileo is a paid product. Starting price: $100/month per 1.2M spans, billed annually. Checked on Galileo's own site, November 2026.

How much do Galileo alternatives cost?

Verified prices for the top-ranked Galileo alternatives: Braintrust, $249/month (Pro); Datadog, Infrastructure Pro, $15 per host/month billed annually; Fiddler AI, $0.002 per trace. Each price was checked on the app's own site; see each card below for the date and source.

Is there a free alternative to Galileo?

Yes. Braintrust (free plan + paid), HoneyHive (free plan + paid), Datadog (free plan + paid) and Traceloop (free plan + paid) have a free option. Check each app's verified facts for current plan limits.

Is there an open-source alternative to Galileo?

Yes: Evidently AI. Evidently AI can also be self-hosted.

Why do people switch from Galileo?

The complaints we hear most: now sold through Splunk with annual billing, heavier to buy than self-serve rivals; not open source; product direction now tied to Splunk's roadmap after the Cisco deal.

How is this list ranked?

Every app is scored with the same published formula: how directly it replaces Galileo, reviews (weighted by verification), visits from AppBreakup, how recently its facts were checked against its own website, and reader votes.