Knock vs Postman
Side-by-side comparison of features, pricing, ratings, and alternatives.
Knock is a customer engagement and notifications platform that gives developers a single API and workflow builder for sending messages across email, SMS, push, chat, and in-app channels. Instead of building and maintaining custom notification pipelines, teams define reusable workflows with preferences, batching, and delivery logic, while non-technical teammates can edit content and audiences without redeploying code. Knock pulls in real-time data from data warehouses, CDPs, and webhooks to drive dynamic audience segmentation and personalized content, and it offers AI-assisted workflow creation from natural language prompts. It's used by companies like Vercel, Webflow, and Medium to handle hundreds of millions of messages per month, with SDKs for 8+ languages and compliance support for HIPAA, SOC2, GDPR, and CCPA.
Postman is an API platform for building and using APIs. Postman simplifies each step of the API lifecycle and streamlines collaboration.
Free for individuals and small teams; paid plans start at $14/user/month.
- Free Developer tier includes 10,000 messages/month with all delivery channels unlocked
- Visual workflow builder lets non-technical teammates manage notification content directly
- Broad SDK coverage across 8+ languages simplifies integration for varied tech stacks
- Enterprise-ready compliance (HIPAA, SOC2, GDPR, CCPA) out of the box
- Industry-standard for API testing
- Powerful scripting for test automation
- Good team collaboration features
- Free tier covers most individual needs
- Starter plan jumps to $250/month, a steep step up from the free tier for growing teams
- Homepage pricing does not list specific per-channel costs, requiring a pricing page dive to compare
- Best suited to teams already comfortable integrating a dedicated notifications API rather than a plug-and-play tool
- Can feel heavy for very simple API calls
- Team plans get pricey at scale
- Occasional sync/performance issues with very large collections
What reviewers say
Knock Reviews
No reviews yet.
Postman Reviews
4.5 (2)Solid choice
I switched to Postman last quarter and haven't looked back. Good team collaboration features. One minor gripe: team plans get pricey at scale, but it hasn't been a dealbreaker. Would recommend to anyone considering it.
Great tool for development
Been a daily user of Postman for a while now. Free tier covers most individual needs. No major complaints so far. Would recommend to anyone considering it.
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The Verdict
AI-generated from listing dataKnock is a dedicated notification‑API platform with a free tier and strong multi‑channel support, while Postman is a general API development and testing suite with broader collaboration tools but no native notification delivery.
Key differences
- •Knock sends messages (email, SMS, push, chat, in‑app) directly; Postman does not provide message delivery.
- •Knock offers a visual workflow builder and AI‑generated workflows for non‑engineers; Postman focuses on request building and testing.
- •Pricing model: Knock’s free tier includes 10,000 messages/month; Postman’s free tier is unlimited requests but paid plans start at $14/user.
- •Integration focus: Knock integrates with data warehouses, CDPs, webhooks for real‑time data; Postman integrates with CI/CD tools like GitHub, Jenkins.
Pricing & value
Knock provides 10,000 free messages/month across all channels; Postman's free tier lacks message‑sending capability.
Ease of use / learning curve
Knock’s visual workflow builder lets non‑engineers edit notifications; Postman can be heavy for simple calls.
Features & depth
Postman offers full REST, GraphQL, gRPC testing, mock servers, and automated monitoring; Knock focuses on notification delivery.
Integrations & ecosystem
Knock integrates with data warehouses, CDPs, webhooks, Slack, Salesforce for real‑time data; Postman integrates with GitHub, Jenkins, Slack.
Collaboration
Postman provides team workspaces, collection sharing, and documentation; Knock’s collaboration is limited to workflow editing.
Scalability
Knock guarantees 99.99% uptime at hundreds of millions of messages; Postman scales for testing but not for message volume.
Security & privacy
Knock lists HIPAA, SOC2, GDPR, CCPA compliance; Postman does not specify such certifications.
Choose Knock if…
Teams needing a production‑grade, multi‑channel notification system with developer SDKs.
Choose Postman if…
API developers or QA teams needing robust testing, mock servers, and documentation collaboration.
Common questions
Can I send SMS or email directly with Postman?
No. Postman is for API development/testing; it does not provide built‑in message delivery.
What is the cost after the free tier for Knock?
The next paid tier is $250/month; per‑channel pricing is not listed on the homepage.
Which tool supports non‑technical team members to edit notification content?
Knock, via its visual workflow builder and AI‑generated workflows.