PostHog vs Convex
Open source product analytics — all-in-one dev tool
vs. The reactive database where queries are TypeScript code
Pricing tiers
PostHog
Free (generous)
No credit card. Each product has its own free monthly quota. Great for startups + OSS.
Free
Paid (usage-based)
Pay only what you use, after free quotas. Volume discounts at higher tiers. 6 projects, 7-year retention.
$0 base (usage-based)
Self-Hosted (OSS)
MIT-licensed. Run on your own infra via Docker/k8s. Zero vendor lock-in.
$0 base (usage-based)
Enterprise
Custom. SAML SSO, dedicated CSM, custom SLA.
Custom
Convex
Starter (Free)
Free with overage via usage-based billing. Great for prototypes.
Free
Professional
$25/developer/month. Overage: $2/M function calls. Daily backups, email support, custom domains.
$25/mo
Business / Enterprise
From $2,500/month. SAML/SSO, SLA, dedicated deployments, Slack Connect support.
$2500/mo
Free-tier quotas head-to-head
Comparing free on PostHog vs starter on Convex.
| Metric | PostHog | Convex |
|---|---|---|
| data warehouse rows | 1000000 rows/month | — |
| db storage gb | — | 0.5 GB |
| deployments | — | 40 deployments |
| egress gb month | — | 1 GB/month |
| error tracking exceptions | 100000 exceptions/month | — |
| feature flags requests | 1000000 requests/month | — |
| file storage gb | — | 1 GB |
| function calls month | — | 1000000 calls/month |
| llm analytics events | 100000 events/month | — |
| logs gb | 50 GB/month | — |
| product analytics events | 1000000 events/month | — |
| projects | 1 projects | — |
| retention years | 1 year | — |
| session replay recordings | 5000 recordings/month | — |
| surveys responses | 1500 responses/month | — |
| team members | unlimited members | 6 users |
Features
PostHog · 14 features
- A/B Testing — Experiments with significance analysis.
- Data Pipelines — Export events to BigQuery, Snowflake, S3.
- Data Warehouse — Query external sources (Stripe, Hubspot, S3) alongside events with SQL.
- Error Tracking — Sentry-style error tracking in same platform.
- Feature Flags — Rollout flags with targeting, A/B testing, JSON payloads.
- LLM Analytics — Tracing + cost tracking for OpenAI, Anthropic, Gemini, etc.
- Logs — Centralized log ingest with free 50 GB/month.
- Product Analytics — Events, funnels, trends, retention, paths. SQL insights available.
- Revenue Tracking — Integration with Stripe for revenue + churn metrics.
- Self-Hosting — Docker/Helm. Full feature parity with cloud.
- Session Replay — Watch user sessions. Privacy controls, masked inputs, JS errors.
- SQL Query API — Run ClickHouse SQL over your events via API.
- Surveys — In-app surveys + feedback widgets.
- Workflows — Trigger emails/webhooks on events.
Convex · 18 features
- Actions — Non-deterministic functions for external I/O (fetch, AI APIs, email). Cannot rea…
- Authentication — Convex Auth (built-in) or BYO provider (Clerk, Auth0, Kinde, WorkOS). ID tokens …
- Convex Agents — AI agent framework with durable memory, threads, tool use. Works with OpenAI / A…
- Convex Auth — First-party auth library: passwords, magic links, OAuth, phone — stored in your …
- Convex Components — Reusable backend modules (rate limiter, workflow, aggregate, action-retrier, etc…
- Cron Jobs — Recurring schedules defined in convex/crons.ts. UTC, cron-style patterns.
- Durable Workflows — Long-running multi-step workflows with retries and at-least-once guarantees.
- Exception Reporting — Auto-capture errors to Sentry, Axiom, Datadog.
- File Storage — Upload/download via storage API. Returns storage IDs referenced in documents.
- Full-Text Search — BM25 search index on table fields. withSearchIndex query helper.
- HTTP Actions — Expose public HTTP endpoints for webhooks, OAuth callbacks, third-party integrat…
- Log Streams — Stream function logs to Axiom, Datadog, Sentry. Pro+.
- Mutations — Transactional write functions. All reads + writes in one mutation are ACID; conf…
- Preview Deployments — Every Git branch gets its own isolated deployment. Integrates with Vercel/Netlif…
- Queries — Deterministic read-only TS functions. Automatically cached and re-run when under…
- Real-Time Subscriptions — useQuery auto-subscribes; server invalidates when data a query read changes. No …
- Scheduler — schedule.after / schedule.at — enqueue functions to run later. Durable, survives…
- Vector Search — Native vector index on tables. withIndex + filter fields. Up to 4096 dims.
Developer interfaces
| Kind | PostHog | Convex |
|---|---|---|
| CLI | — | Convex CLI |
| SDK | posthog-android, posthog-flutter, posthog-go, posthog-ios (Swift), posthog-js, posthog-node, posthog-php, posthog-python, posthog-react-native, posthog-ruby | Android / Kotlin Client, iOS / Swift Client, JavaScript/TypeScript Client, Next.js Integration, Python Client, React Client (useQuery), Rust Client, Svelte Client, Vue Client |
| REST | PostHog REST API | Deploy / Dashboard API, HTTP Actions |
| MCP | PostHog MCP | — |
| OTHER | Webhooks + Actions | WebSocket Subscriptions |
Staxly is an independent catalog of developer platforms. Outbound links to PostHog and Convex are plain references to their official websites. Pricing is verified against vendor pages at publication time — reconfirm before buying.
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