What is the difference between Sentry and Axiom?

Sentry is best for Development teams that need to catch, triage, and fix errors quickly, while Axiom is best for Developers wanting unlimited log ingestion. Sentry starts at $26/mo and Axiom starts at Free.

Is Sentry or Axiom cheaper?

Sentry starts at $26/mo with a free tier. Axiom starts at Free with a free tier.

Is there a free alternative to Axiom?

Both Sentry and Axiom offer free tiers.

Sentry vs Axiom

Sentry is application monitoring platform focused on error tracking, performance monitoring, and session replay, while Axiom is log management and observability platform with unlimited data ingestion and powerful queries. The biggest difference up front: Axiom is free, while Sentry starts at $26/mo. Sentry is built for development teams that need to catch, triage, and fix errors quickly, whereas Axiom targets developers wanting unlimited log ingestion.

At a glance

	Sentry	Axiom
Best for	Development teams that need to catch, triage, and fix errors quickly	Developers wanting unlimited log ingestion
Starting price	$26/mo	Free
Free tier	✓	✓
Open source	✓	—
Free tier available	✓	✓
Open source	✓	—
Alerts	✓	✓
Dashboards	—	✓
Error Tracking	✓	—
Performance Monitoring	✓	—
Release Tracking	✓	—
Session Replay	✓	—
Traces	—	✓
Unlimited Ingest	—	✓

Sentry

Strengths

Best-in-class error tracking with detailed stack traces
Session replay shows exactly what users experienced
Open source with self-hosting option
Supports virtually every language and framework

Weaknesses

Event-based pricing can get expensive with noisy apps
Performance monitoring is less mature than dedicated APM tools
Alert fatigue if not configured carefully
Self-hosted version requires significant infrastructure

Try Sentry → Full review

Axiom

Strengths

Includes Unlimited Ingest as a core feature, purpose-built for monitoring workflows
Customizable dashboards give real-time visibility into project progress
Free 500 GB/mo ingest — generous enough for most small teams to get real work done
Includes alerts alongside the core feature set — fewer separate tools needed

Weaknesses

Free plan exists but key features are locked behind the paid upgrade
Fewer built-in features means you may need additional tools to cover gaps
Ecosystem of third-party integrations is smaller than the market leaders in monitoring
Limited team/admin features if your organization eventually scales up

Try Axiom → Full review

The bottom line

Pricing: Axiom is completely free (Free 500 GB/mo ingest), which makes it the obvious pick if budget is the top concern. Sentry starts at $26/mo, but Free for 5K errors and 10K performance events/mo. That cost buys you a more polished or feature-rich experience, so it comes down to whether the extras justify the spend.

Feature gaps: Sentry offers Error Tracking, Performance Monitoring and Release Tracking that Axiom lacks. Axiom brings Dashboards, Traces and Unlimited Ingest that Sentry does not have. Both share Alerts.

Team fit: Sentry is geared toward any size teams, while Axiom is aimed at small teams teams. Pick the one that matches where your team is today and where it is headed — migrating tools later is always painful.

Open source: Sentry is open source, meaning you can self-host, audit the code, and avoid vendor lock-in. Axiom is proprietary — you are trusting the vendor with your data and uptime.

Where each tool shines: Sentry's biggest strengths are: best-in-class error tracking with detailed stack traces. session replay shows exactly what users experienced. Axiom's biggest strengths are: includes unlimited ingest as a core feature, purpose-built for monitoring workflows. customizable dashboards give real-time visibility into project progress.

Watch out for: With Sentry, users commonly note that event-based pricing can get expensive with noisy apps. With Axiom, the main complaint is that free plan exists but key features are locked behind the paid upgrade.

Choose Sentry if...

You need a tool built for development teams that need to catch, triage, and fix errors quickly
You need self-hosting, data sovereignty, or the ability to audit source code
You specifically need Error Tracking and Performance Monitoring
You care about session replay shows exactly what users experienced
Your team size fits the any size profile Sentry is designed for

Choose Axiom if...

Your profile matches its sweet spot: developers wanting unlimited log ingestion
Budget is a hard constraint — Axiom is free, Sentry is not
You specifically need Dashboards and Traces
You care about customizable dashboards give real-time visibility into project progress
Your team size fits the small teams profile Axiom is designed for