Softwr

Communication · head to head

Novu vs Slack

Novu logo

Novu

Communication

Open-source notification infrastructure for multi-channel messaging

From
Free
Rated
-
Full reviewWebsite
Slack logo

Slack

Communication

Where work happens

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Novu free plan activity feed retention is limited to 24 hours, restricting how far back teams can debug delivery issues.; Slack 90-day message history limit on free plan results in important conversations disappearing
  • They diverge on capability: Novu covers Multi-channel workflows, Slack covers Channels.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Novu and Slack actually diverge.

Attributes where Novu and Slack differ
AttributeNovuSlack
Pricing modelfreemiumUnknown
Platformsweb, apiWeb, iOS, Android, macOS, Windows, Linux
FoundedUnknown2009

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Communication).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Novu

  • Multi-channel workflows
  • Advanced email editor
  • Activity feed
  • Multi-environment support
  • Role-based access control
  • Self-hosting

Only in Slack

  • Channels
  • Direct messaging
  • Voice & video calls
  • Screen sharing
  • File sharing
  • Search
  • Workflow builder
  • Slack Connect

What people use each for

The jobs each tool is most often brought in to do.

Novu

  • Building multi-channel notification workflows for a SaaS productnot Slack
  • Self-hosting notification infrastructure for data controlnot Slack
  • Managing separate notification environments for staging and productionnot Slack
  • Tracking notification delivery history and activitynot Slack

Slack

  • Team communicationnot Novu
  • Project coordinationnot Novu
  • Customer supportnot Novu
  • Remote worknot Novu
  • Cross-functional collaborationnot Novu

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Novu

  • Free plan activity feed retention is limited to 24 hours, restricting how far back teams can debug delivery issues.
  • Overage on Pro and Team plans is billed at $1.20 per 1,000 additional workflow runs, which can add up at scale.
  • HIPAA BAA compliance and dedicated SSO are Enterprise-only and require custom pricing.

Slack

  • 90-day message history limit on free plan results in important conversations disappearing
  • Per-user pricing becomes expensive quickly for larger teams
  • Notification overload with 78% of employees feeling overwhelmed by notifications
  • Mobile app performance issues including lag and slow syncing
  • Huddles limited to 50 people and cannot be recorded
  • Requires dedicated video conferencing service for formal meetings and webinars

Pricing, plan by plan

Novu

Free
  • FreeFree
    • 10,000 workflow runs/month
    • All channels included
    • Up to 20 workflows
  • Pro$30/month
    • 30,000+ workflow runs/month
    • Advanced email editor
    • Remove Novu branding
  • Team$250/month
    • 250,000+ workflow runs/month
    • Up to 10 environments
    • 90-day activity feed retention

Slack

Free

No published plan breakdown. See the Slack review.

Which should you pick?

Choose Novu if

  • You need multi-channel workflows.
  • You want to start without paying.
  • You work on web, api.
  • You also want advanced email editor.
Novu review

Choose Slack if

  • You need channels.
  • You want to start without paying.
  • You work on Web, iOS, Android, macOS, Windows, Linux.
  • You also want direct messaging.
Slack review

Questions people ask

Is Novu or Slack better?
Neither clearly leads. Novu starts at Free and Slack at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Novu or Slack?
Novu starts at Free and Slack at Free.
Does Novu or Slack run on more platforms?
Novu runs on web, api. Slack runs on Web, iOS, Android, macOS, Windows, Linux.
Can I use Novu for free?
Both have a free tier, so you can try either at no cost before committing.
What is Novu best used for?
Novu is most often used for building multi-channel notification workflows for a saas product, self-hosting notification infrastructure for data control, managing separate notification environments for staging and production, tracking notification delivery history and activity. Of those, building multi-channel notification workflows for a saas product and self-hosting notification infrastructure for data control are not what Slack is typically brought in for.
What can Novu do that Slack cannot?
Novu covers Multi-channel workflows, Advanced email editor, Activity feed, Multi-environment support. Slack covers Channels, Direct messaging, Voice & video calls, Screen sharing.

Answered from the vendors’ own pages

Novu: What does Novu cost?

Novu offers a Free plan for 10,000 workflow runs per month, Pro from $30/month for 30,000+ runs, Team from $250/month for 250,000+ runs, and custom Enterprise pricing for 10M+ runs.

Source
Slack: Does Slack have a free plan?

Yes, Slack offers a free plan indefinitely with no credit card required. Free users get 90-day message history, up to 10 app integrations, and 1:1 huddles.

Source
Novu: Is there a free plan, and what are its limits?

Yes, the Free plan includes 10,000 workflow runs per month, all messaging channels, up to 20 workflows, 2 environments, and up to 3 team members.

Source
Slack: What are Slack's pricing plans?

Slack offers Free, Pro ($7.25/user/month with annual billing), Business+ ($12.50/user/month), and Enterprise Grid (custom pricing). Monthly billing costs approximately 20% more than annual.

Source
Novu: How is usage metered?

Billing is based on the number of workflow runs per month rather than per user or per message, with overage on paid plans charged at $1.20 per 1,000 additional runs.

Source
Slack: Does Slack support offline use?

Slack is a cloud-based platform and does not support robust offline work. Internet connectivity is required to access messages and collaborate.

Source
Slack: What integrations does Slack support?

Slack integrates with 43+ apps on average per team, including Google Drive, ChatGPT, Vercel, Asana, GitHub, and many others through their app marketplace.

Source
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