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Rasa vs Slimchat

Rasa logo

Rasa

Live Chat

Open-source framework for building conversational AI

From
Free
Rated
-
Full reviewWebsite
S

Slimchat

Live Chat

Lightweight live chat solution for websites

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Rasa free Developer Edition caps conversations at 1,000 external or 100 internal per company per month; Slimchat the vendor's own homepage as captured by the Internet Archive on 19 August 2018 (via Novosi, LLC) shows SlimChat was still pre-release at that date, offering an email signup for '3 months FREE' with an 'Expected release: summer 2018' notice and a $15 incentive to test a tour version; combined with the live site now serving a mismatched Squarespace certificate, this indicates the product likely never reached a stable commercial release
  • They diverge on capability: Rasa covers NLU engine, Slimchat covers Live chat widget.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Rasa and Slimchat actually diverge.

Attributes where Rasa and Slimchat differ
AttributeRasaSlimchat
PlatformsOn-premise, Cloud deployment, Docker, KubernetesWeb, Mobile responsive

Identical on both: starting price (Free), pricing model (freemium), free tier (Yes), user rating (Not yet rated), category (Live Chat), founded (2016).

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 Rasa

  • NLU engine
  • Dialogue management
  • Multi-language support
  • Testing tools
  • Slack
  • Teams
  • Custom channels
  • On-premise support

Only in Slimchat

  • Live chat widget
  • Lightweight design
  • Fast loading
  • Visitor information
  • Zapier
  • Webhooks
  • Web support
  • Mobile responsive support

Both cover

  • API

What people use each for

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

Rasa

  • Developers self-hosting an open source conversational AI framework before needing enterprise scalenot Slimchat

Slimchat

  • Customer engagementnot Rasa
  • Lead generationnot Rasa
  • Customer supportnot Rasa
  • Sales automationnot Rasa

Where each one falls short

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

Rasa

  • Free Developer Edition caps conversations at 1,000 external or 100 internal per company per month
  • Rasa Pro and the Business Plan (Pro plus Studio) are not priced on the site and require contacting sales

Slimchat

  • The vendor's own homepage as captured by the Internet Archive on 19 August 2018 (via Novosi, LLC) shows SlimChat was still pre-release at that date, offering an email signup for '3 months FREE' with an 'Expected release: summer 2018' notice and a $15 incentive to test a tour version; combined with the live site now serving a mismatched Squarespace certificate, this indicates the product likely never reached a stable commercial release

Pricing, plan by plan

Rasa

Free
  • Free Developer EditionFree
    • One bot per company
    • Up to 1,000 external conversations per month or 100 internal conversations per month
    • Free Rasa license for local or production use
  • Rasa Pro$undefined/mo
    • Pro-code framework with CALM dialogue understanding
    • Language-agnostic NLU, enterprise search, multi-LLM management
    • Kubernetes support
  • Enterprise$undefined/mo
    • Full access to Rasa Platform and Premium Support
    • 24/7/365 support with Customer Success Manager
    • Business reviews and guidance

Slimchat

Free
  • FreeFree
    • Live chat
    • 1 agent
    • Basic features
  • Pro$20/month
    • Multiple agents
    • Advanced options
  • Business$50/month
    • Unlimited features
    • Priority support

Which should you pick?

Choose Rasa if

  • You need nlu engine.
  • You want to start without paying.
  • You work on On-premise, Cloud deployment, Docker, Kubernetes.
  • You also want dialogue management.
Rasa review

Choose Slimchat if

  • You need live chat widget.
  • You want to start without paying.
  • You work on Web, Mobile responsive.
  • You also want lightweight design.
Slimchat review

Questions people ask

Is Rasa or Slimchat better?
Neither clearly leads. Rasa starts at Free and Slimchat at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Rasa or Slimchat?
Rasa starts at Free and Slimchat at Free.
Does Rasa or Slimchat run on more platforms?
Rasa runs on On-premise, Cloud deployment, Docker, Kubernetes. Slimchat runs on Web, Mobile responsive.
Can I use Rasa for free?
Both have a free tier, so you can try either at no cost before committing.
What is Rasa best used for?
Rasa is most often used for developers self-hosting an open source conversational ai framework before needing enterprise scale. Of those, developers self-hosting an open source conversational ai framework before needing enterprise scale is not what Slimchat is typically brought in for.
What can Rasa do that Slimchat cannot?
Rasa covers NLU engine, Dialogue management, Multi-language support, Testing tools. Slimchat covers Live chat widget, Lightweight design, Fast loading, Visitor information. Both handle API.

Answered from the vendors’ own pages

Rasa: Does Rasa offer a free version?

Yes. Rasa offers a free Developer Edition with one bot per company, up to 1,000 external conversations per month, and free community support.

Source
Rasa: What support is included with Rasa's free tier?

The free tier includes community forum support with responses from Rasa community members. Paid tiers add premium support with enhanced response times.

Source
Rasa: What is the difference between Rasa Pro and Enterprise?

Rasa Pro includes the pro-code framework with advanced NLU and multi-LLM management. Enterprise adds full platform access, 24/7 support, dedicated Customer Success Manager, and business reviews.

Source
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