Convex vs Postmark

Convex

Postmark

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.

Postmark · 12 features

• Activity Search — Full-text search over sent messages for 45-365 days.
• Bounce Handling — Automatic hard/soft bounce detection + suppression management.
• Broadcast Messages — Via separate Broadcast Message Stream. Bulk sends with throttling.
• DKIM + SPF — One-click verification + auto-renewal of DKIM keys.
• Inbound Email — Route inbound emails to your webhook. Parse attachments, threads.
• Message Streams — Isolate transactional from marketing for separate deliverability reputation.
• Open + Click Tracking — Configurable at template or send level.
• Raw API Access — 100+ endpoints for bounces, servers, tags, templates, stats.
• Servers — Multi-tenant isolation: each "server" has its own API token + reputation.
• Templates — Mustachio template language with variables, alias + versioning.
• Transactional Send — Reliable API for password resets, receipts, notifications. Sub-10s delivery.
• Webhook Events — Delivery, bounce, spam complaint, open, click, subscription change.