Knock vs Novu
An independent, review-free comparison compiled by the SaaSTracker editorial team. Both products are profiled in full, and neither can pay for placement here.
The short answer
Both sides assessedKnock compared with Novu
Novu is the open-source answer to the same problem: workflows, inbox component, digests, and preferences, metered by workflow runs from $30 a month, with a self-hostable core. Knock is closed source, more expensive, and more mature on multi-tenancy, environments, and enterprise controls. Choose Novu when self-hosting or budget matters most, or when $30 versus $250 decides it; choose Knock when the notification layer is critical path and you want a vendor with SLAs behind it.
Novu compared with Knock
The same category, opposite trade-offs. Knock is closed, more mature, deeper on multi-tenancy and environments, and starts at $250 a month above its free tier. Novu is open source, self-hostable, and starts at $30. A funded B2B SaaS company putting notifications on the critical path should probably pay for Knock; a cost-sensitive team, a company with data residency requirements, or anyone embedding notifications into their own product should take Novu.
Choose Knock if
Product and engineering teams at SaaS companies who need real product notifications (in-app feed, digests, preference centers, per-tenant configuration) and want the workflow logic owned by a platform a PM can edit rather than by application code an engineer has to redeploy.
Choose Novu if
Engineering teams who want notification infrastructure they can read, fork, and self-host if they need to, and small companies who want a real paid plan at $30 a month rather than a $250 floor.
Side by side
13 attributes| Attribute | Knock | Novu |
|---|---|---|
| Category | Automation | Automation |
| Starting price | $0 (Developer), then $250 per month (Starter) (free plan available) | $0 (Free or self-hosted), then $30 per month (Pro) (free plan available) |
| Pricing model | Usage-based on messages sent, with a separate meter for Guide active users and AI agent credits, plus a large free tier and a single published paid plan before enterprise contracts. | Usage-based on workflow runs (one run per triggered workflow regardless of how many channels it fans out to), with a free tier, two published paid tiers, quoted enterprise pricing, and a free open-source self-hosted option. |
| Free plan | Developer includes 10,000 messages a month, 500 Guide active users, 500 AI agent credits, unlimited workflows, unlimited channels, unlimited team members, batching, delays, broadcasts, multi-tenancy, and Google SSO. | 10,000 workflow runs per month, up to 20 workflows, two environments, three team members, and 24 hours of activity feed retention, across every channel. |
| Free trial | No time-limited trial; the Developer plan is permanently free | No time-limited trial; the free cloud plan and the open-source distribution both serve as evaluation paths |
| Best for | Product and engineering teams at SaaS companies who need real product notifications (in-app feed, digests, preference centers, per-tenant configuration) and want the workflow logic owned by a platform a PM can edit rather than by application code an engineer has to redeploy. | Engineering teams who want notification infrastructure they can read, fork, and self-host if they need to, and small companies who want a real paid plan at $30 a month rather than a $250 floor. |
| Setup time | A day to a first workflow in production for a competent backend engineer, and one to three sprints to migrate an existing homegrown notification service. The in-app feed component is typically the fastest visible win. | An afternoon for a cloud integration with the Inbox component. Self-hosting is a different project: a day or two to a working Docker deployment and considerably longer to something a team would trust in production, with MongoDB and Redis to operate afterwards. |
| Learning curve | Low for engineers, moderate for product people. The concepts (workflows, recipients, tenants, channels, preferences) are clean, but the mental model of moving decision logic out of application code into a workflow platform takes a team a couple of weeks to internalize. | Low for engineers. Subscribers, workflows, steps, and providers are clean concepts and the CLI quickstart gets a first notification flowing in minutes. Workflows as code is the part teams take longest to adopt, because it changes who owns a message change. |
| Platforms | Web dashboard, REST API, CLI, React and JavaScript components, iOS, Android, React Native, and Flutter clients, MCP server | Web dashboard, REST API, CLI, React Inbox component, Self-hosted via Docker or Kubernetes, Private cloud deployment |
| Compliance | SOC 2, GDPR, CCPA, HIPAA with a BAA on Enterprise | SOC 2 Type II, ISO 27001, GDPR, HIPAA support |
| Founded | 2021 | 2021 |
| Headquarters | New York, New York, United States | Tel Aviv, Israel |
| Ownership | Venture-backed | Venture-backed, open-source core |
Strengths and limitations
Knock
Strengths
- Batching, digests, preference centers, and multi-tenancy are all first-class, and they are exactly the four things engineering teams build worst when they build them in-house.
- The free Developer tier is extraordinarily generous, including unlimited workflows, unlimited channels, unlimited team members, and multi-tenancy at $0.
- Bring-your-own-provider means you keep your sending reputation, your existing SendGrid or Twilio contracts, and your negotiated rates.
- Workflows as code with CLI, version control, CI validation, environments, and one-click rollback, which makes notification changes a normal part of the software lifecycle instead of a risk.
Limitations
- Completely unusable without engineering; there is no path where a marketer signs up and gets value, because nothing happens until code calls the API.
- The pricing cliff from $0 to $250 a month with no intermediate plan penalizes exactly the small companies the free tier attracted.
- Guides are metered separately on active users, so the in-product messaging feature has its own cost curve that is easy to miss when budgeting.
- You still pay for delivery separately, and you still own deliverability, list hygiene, and domain authentication yourself.
Novu
Strengths
- Genuinely open source with a self-hostable core, which is the only real answer in this batch to data sovereignty, embedding, and vendor risk concerns.
- Pro at $30 a month is the cheapest meaningful paid tier among developer notification tools and fills the gap Knock's plan structure leaves wide open.
- The workflow-run meter is cheaper than per-message billing for any notification that fans out to more than one channel.
- The React Inbox component ships a real-time notification centre with preferences, snooze, and quiet hours in an afternoon, with a headless option for teams that want their own UI.
Limitations
- Self-hosting is free in licence terms only; running MongoDB, Redis, and the surrounding services is a permanent operational cost that small teams routinely underestimate.
- The free plan's 20-workflow, 2-environment, and 3-seat caps constrain growing teams before the run count does.
- Multi-tenancy, per-customer branding, and enterprise access controls are less developed than Knock's, which matters for B2B products with tenant-specific configuration.
- Small company on $7M raised holding a critical path position, mitigated but not eliminated by the open-source licence.
Pricing compared
Knock
Usage-based on messages sent, with a separate meter for Guide active users and AI agent credits, plus a large free tier and a single published paid plan before enterprise contracts.
- Developer$0
- Starter$250
- EnterpriseCustom
Knock is priced as infrastructure, and the honest comparison is not against Mailchimp but against the salary cost of the engineer who would otherwise own your notification service. On that basis the free tier is remarkable value and Starter at $250 is fair, since 50,000 messages with batching, preference centers, in-app feed, and multi-tenancy is a quarter of engineering work you no longer do. The weakness is the plan gap: a team sending 15,000 messages a month is paying $250 for capability it barely uses, and the separate Guides meter means the sticker price understates the cost of using the whole product. Add your own provider bills on top and Knock is never the cheapest line on the invoice, but it is usually the one that saves the most.
Novu
Usage-based on workflow runs (one run per triggered workflow regardless of how many channels it fans out to), with a free tier, two published paid tiers, quoted enterprise pricing, and a free open-source self-hosted option.
- Free$0
- ProFrom $30
- TeamFrom $250
- EnterpriseCustom
Novu is the best-value paid plan in the developer notification category and the only one with a self-hosting escape hatch. Pro at $30 for 30,000 workflow runs is an order of magnitude cheaper than Knock's $250 floor, and the workflow-run meter is more forgiving than a per-message meter the moment you send to more than one channel. At 100,000 runs a month you are paying around $114 against Courier's $500 for a comparable message count. What you give up is maturity: the enterprise controls, multi-tenancy depth, and operational polish of Knock are ahead, the company is small, and self-hosting is only free if your engineers' time is worthless. For teams weighing cost against maturity, Novu is the value pick and Knock is the safe pick.
Editorial verdict on each
Knock
Knock is the right purchase when your notification problem is a product problem rather than a marketing problem. If people are complaining about email volume, if a preference center keeps slipping down the roadmap, if enterprise customers want Slack delivery, or if an engineer already owns a homegrown notification service they resent, this is the layer to buy and the free Developer tier is generous enough to prove it in a weekend. The reasons to walk away are equally clear: there is no marketing surface, nothing works without engineering, you still pay your own providers, and the leap from $0 to $250 a month with nothing in between is genuinely painful for a small team. For a five-person startup, Knock is the first thing to reach for only if you are shipping a product with an in-app notification feed. If your immediate need is onboarding emails and lifecycle campaigns, start with Customer.io, Bento, or Dittofeed and add Knock later when the product notifications become their own problem.
Read the full Knock profileNovu
Novu is the value and control pick in developer notification infrastructure. Pro at $30 a month for 30,000 workflow runs undercuts every closed competitor by an order of magnitude, the workflow-run meter is more forgiving than per-message billing the moment a notification touches two channels, and the React Inbox component delivers the thing most teams actually came for in an afternoon. The open-source licence is not decoration: it is the only credible answer in this batch to data sovereignty requirements, to embedding notifications into a product you sell, and to the reasonable worry about putting critical path infrastructure on a company that has raised $7M. The costs are honest ones. Self-hosting is free only if your engineers' time is, multi-tenancy and enterprise controls trail Knock, and there is no marketing surface at all. For a five-person startup that needs an in-app notification feed and digests without a $250 monthly floor, Novu Cloud is the sensible first purchase in this batch, and the ability to self-host later is worth having even if you never use it.
Read the full Novu profileKnock profile last reviewed 2026-08-22; Novu last reviewed 2026-08-22. Pricing is compiled from public sources and can change without notice. See our methodology.