Amplitude vs Axiom
Digital analytics + experimentation + CDP
vs. Observability for logs, traces, events — serverless-first, infinite scale
Pricing tiers
Amplitude
Starter (Free)
10K Monthly Tracked Users, 10M events/mo. Session Replay + unlimited feature flags + Web Experimentation + AI Feedback included.
Free
Plus
$49/mo (annual). Up to 300K MTUs + 25M events. Unlimited product analytics, behavioral cohorts, feature tagging, custom audiences.
$49/mo
Growth
Custom. Causal insights, Feature Experimentation, real-time streaming, predictive audiences.
Custom
Enterprise
Custom. Cross-product analysis, advanced data controls, mutual exclusion groups, multi-armed bandit.
Custom
Axiom
Personal (Free)
No credit card. 500 GB/month ingest, 10 GB-hr compute, 25 GB storage, 30-day retention max.
Free
Axiom Cloud
$25/month minimum platform fee. Volume-based ingest + query credits. Always-free allowances: 1 TB/mo ingest, 100 GB-hr queries, 100 GB storage.
$25/mo
RBAC Add-on
+$50/month for role-based access control.
$50/mo
Audit Logs Add-on
+$50/month for audit logs.
$50/mo
Directory Sync Add-on
+$100/month for SCIM.
$100/mo
SSO Add-on
+$100/month for SAML SSO.
$100/mo
Enterprise
Custom. Dedicated cluster option, private connectivity, SLA.
Custom
Free-tier quotas head-to-head
Comparing starter on Amplitude vs personal on Axiom.
| Metric | Amplitude | Axiom |
|---|---|---|
| ingest gb month | — | 500 GB/month |
| query compute gb hr | — | 10 GB-hr/month |
| retention max days | — | 30 days |
| storage gb | — | 25 GB |
Features
Amplitude · 13 features
- AI Feedback (Asking) — Natural language questions over your Amplitude data.
- Amplitude CDP — Customer Data Platform — identify, segment, sync to 150+ destinations.
- Causal Insights — AI identifies why a metric changed — root cause.
- Cross-Product Analysis — Analyze across multiple apps/products in the same org.
- Data Governance — Taxonomies, schemas, approvals, category management.
- Data Warehouse Sync — Sync data to/from Snowflake, BigQuery, Redshift, Databricks.
- Feature Experimentation — Server-side / SDK-level experiments. Growth+.
- Feature Flags — Targeting rules + rollouts. Unlimited in Starter.
- North Star Metric — Pre-built dashboards for key metric tracking.
- Predictive Audiences — ML-based forecasting of user behavior.
- Product Analytics — Core events + funnels + retention + segmentation.
- Session Replay — Pixel-perfect user session recording + privacy masking.
- Web Experimentation — A/B test visual changes on your site without deploy.
Axiom · 15 features
- API Tokens — Scoped tokens for ingest or query.
- APL (query language) — Axiom Processing Language — Kusto-inspired pipes (`|`). Fast + expressive.
- AWS Lambda Extension — Native extension to ship Lambda logs + traces.
- Cloudflare Integration — Workers + Pages log drain. Log pull from any Cloudflare zone.
- Dashboards — Visualizations from APL queries: line/bar/pie/heatmap/table.
- Datasets — Logical partitions of data. Schema-free; fields auto-indexed.
- Elastic Bulk API compat — Elasticsearch Bulk API endpoint — drop-in replacement.
- Field Explorer — Auto-detected field stats, histograms, top-values per dataset.
- Monitors (alerts) — Threshold + anomaly-based alerting on APL queries. Route to Slack/PagerDuty/emai…
- next-axiom — Next.js logger with automatic correlation + Web Vitals capture.
- OpenTelemetry-native — Ingest OTLP/HTTP + gRPC. No proprietary agent.
- Saved Queries — Save + share APL queries as starters.
- Stream (live tail) — Live tail of incoming events with filter bar.
- Traces — OpenTelemetry-native. Distributed tracing across services.
- Vercel Integration — One-click: Vercel logs + Web Vitals → Axiom.
Developer interfaces
| Kind | Amplitude | Axiom |
|---|---|---|
| CLI | — | Axiom CLI |
| SDK | amplitude-analytics-python, @amplitude/analytics-react-native, amplitude-android, amplitude-js / browser-sdk, amplitude-node, AmplitudeSwift (iOS) | axiom-go, @axiomhq/js, axiom-py, axiom-rs, next-axiom |
| REST | Amplitude HTTP API v2, Batch Event API, Export API | Axiom REST API, Ingest HTTP endpoint |
| MCP | — | Axiom MCP |
| OTHER | Data Destinations (webhooks) | — |
Staxly is an independent catalog of developer platforms. Outbound links to Amplitude and Axiom are plain references to their official websites. Pricing is verified against vendor pages at publication time — reconfirm before buying.
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