Replicate vs Knock
Run and fine-tune AI models in the cloud — pay-per-second GPU
vs. Notifications-as-a-service: in-app feeds, email, push, SMS, chat via one API
Pricing tiers
Replicate
Pay-as-you-go
Per-second GPU billing. No minimum. Public models billed by processing time or tokens.
$0 base (usage-based)
Enterprise
Custom. Dedicated capacity, private deployments, SOC2, HIPAA on request.
Custom
Knock
Developer
Free forever. 10K messages, 500 guide users, 500 AI credits/month.
$0 base (usage-based)
Starter
$250/mo. 50K messages, 2.5K guide users, 2K AI credits. Remove branding.
$250/mo
Enterprise
Custom pricing. White-label, i18n, data warehouse, Datadog, SCIM, SAML, HIPAA/BAA.
Custom
Free-tier quotas head-to-head
Comparing payg on Replicate vs starter on Knock.
| Metric | Replicate | Knock |
|---|---|---|
| guide users | — | 2500 users |
| guide users overage | — | $0.05/user USD/user |
| messages monthly | — | 50000 messages/mo |
| messages overage | — | $0.005/message USD/message |
Features
Replicate · 11 features
- 10k+ Models — Public catalog of image, video, audio, LLM, embedding, speech models.
- Batch Predictions — Parallel batch execution.
- Cog — OSS tool to containerize ML models. Standard for Replicate.
- Deployments — Private model endpoints with dedicated GPUs.
- File Storage — Temporary output file hosting.
- Fine-Tuning — Fine-tune FLUX, SDXL, Llama 2/3 with your data.
- Per-Second Billing — Pay only while model runs. No idle cost for public models.
- Playground — Interactive UI for every public model.
- Predictions API — Async + sync + streaming predictions.
- Streaming Outputs — SSE streaming for LLMs + audio.
- Webhooks — Notify when predictions complete.
Knock · 13 features
- AI Agents — Autonomous notification drafting & workflow generation.
- Batch + Digest — Group notifications into digests on schedule or window.
- Chat — Slack, Microsoft Teams, Discord.
- Email — Send via SendGrid/Postmark/Resend/Mailgun/AWS SES as relays.
- Guides — In-product messaging, announcements, modals, banners.
- i18n / Localization — Translate templates by user locale.
- In-App Feed — Notification inbox with React/Vue/iOS/Android drop-in components.
- Multi-tenancy — Per-tenant branding, preferences, quiet hours.
- Outbound Webhooks — Subscribe to delivery events.
- Preferences — User + tenant preference center with granular controls.
- Push — iOS (APNs), Android (FCM), Expo, Web Push.
- SMS — Twilio, MessageBird, Telnyx, Vonage as providers.
- Workflows — Visual notification orchestration (branch, batch, delay, throttle).
Developer interfaces
| Kind | Replicate | Knock |
|---|---|---|
| CLI | Cog (package models) | Knock CLI |
| SDK | replicate-go, replicate (Node), replicate-python | knockapi (Python), knockapi (Ruby), knock-elixir, knock-go, knock-java, @knocklabs/node, @knocklabs/react |
| REST | Replicate REST API | Knock REST API |
| MCP | Replicate MCP | Knock MCP Server |
| OTHER | Webhooks | Outbound Webhooks |
Staxly is an independent catalog of developer platforms. Some links to Replicate and Knock may be affiliate links — Staxly may earn a commission if you sign up through them, at no extra cost to you. Pricing is verified against vendor pages at publication time — reconfirm before buying.
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