Knock alternative: Nordva Launch
Knock is messaging infrastructure, now pitched as agentic customer engagement, that sends product, marketing and transactional messages across email, SMS, push, chat and in-app channels using workflows, broadcasts and in-app guides defined in a dashboard, in code or by its AI agent. This page sets it next to Nordva Launch on the things a developer checks first: price, API, MCP support and scope. Vendor facts were read from knock.app on 2026-09-24; prices change, so verify before deciding.
| Knock | Nordva Launch | |
|---|---|---|
| What it is | Knock is messaging infrastructure, now pitched as agentic customer engagement, that sends product, marketing and transactional messages across email, SMS, push, chat and in-app channels using workflows, broadcasts and in-app guides defined in a dashboard, in code or by its AI agent. | One API and MCP server for changelog, waitlist, feedback triage, in-app notifications, and read-only Stripe revenue, contacts and attribution. |
| Free tier | Yes: Developer plan $0/month: 10K messages, 500 guide active users, 500 AI agent credits (then $.01 per credit); unlimited workflows, broadcasts, channels and team members, batch and delay, multi-tenancy, Google SSO, 30-day log retention. More messages need an upgrade; the free plan is not hard-capped. | Yes: 2 projects, each with 100 waitlist signups and 25 changelog entries; web analytics up to 10,000 events a month and a Stripe connection; API and MCP included; no card |
| Entry price | $250/month (Starter: 50K messages then $.005 per message, 2.5K guide active users then $.05 per user, 2,000 AI agent credits then $.01 per credit; adds branding removal and email client previews.). Enterprise: contact sales (volume or monthly-notified-user pricing, annual commit discounts, custom roles, per-tenant branding and preferences, i18n, SAML SSO, SCIM, HIPAA BAA, 90-day log retention) | $19/month (Indie), about 20% off annually |
| Public API | Yes: REST API plus Management API; server SDKs for Node, Python, Ruby, Go, Java, .NET, Elixir and PHP; client SDKs for JavaScript, React, iOS (Swift), Android (Kotlin), Flutter, React Native and Expo; Node SDK for the Management API; CLI. | Yes: REST, keys scoped to one project (1 to 3 per project by plan), idempotent writes |
| MCP server | Yes: Remote MCP server at mcp.knock.app/mcp (OAuth or API key); docs: it 'exposes the primitives of Knock to LLMs and AI via the Model Context Protocol'; listed as a community connector in Anthropic's connectors directory; homepage links it with the CLI. | Yes: mcp.nordva.dev, one server for every primitive, on every plan including Free. Works with Claude Code, Claude Desktop, Cursor, VS Code and Windsurf |
| Covers | Changelog: no · Waitlist: no · Feedback: no · In-app notifications: yes · Revenue metrics: no · Contacts: no · Attribution: no | Changelog: yes · Waitlist: yes · Feedback: yes · In-app notifications: yes · Revenue metrics: yes · Contacts: yes · Attribution: yes |
What Knock offers
- In-app feeds and 'Guides' in-app components (paywalls, dialogs, nudges) with your own components
- Preference center and send windows
- Batching/digests, segments, personalization, broadcasts
- AI agent that builds workflows and emails from a prompt
- Data ingestion from warehouses, CDPs, reverse ETL and webhooks
- Version control, CI/CD and observability for workflows
Based in New York, NY (terms of service: notice address 236 Clinton St, Brooklyn, NY 11201; New York law).
Where Nordva Launch differs
Knock is multichannel messaging infrastructure: email, SMS, push, chat and in-app, with workflows, broadcasts, digests, preference management and an AI agent, and a $250/month Starter above the free tier. Nordva Launch's notifications primitive is in-app only: send to a user id, a group picked from contacts, or everyone, now or scheduled; poll from the browser with a signed user id; mark read, archive, count clicks. It is one of seven primitives, included on every plan with a monthly cap (1,000 on Free), not a messaging platform.
Stay on Knock if
You need SMS, push or email orchestration, user preferences and digests, or you send more than a small product's volume.
Try the overlap on the free plan.
No card. One key. The MCP server is included on every plan.