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AI · head to head

Replika vs Synthesia

Replika logo

Replika

AI

AI companion for meaningful conversations

From
Free
Rated
-
Full reviewWebsite
Synthesia logo

Synthesia

Video Production

AI video creation with digital presenters

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Replika pricing not published on main website or pricing page; Synthesia free plan limited to 10 minutes of video per month
  • They diverge on capability: Replika covers Conversational AI, Synthesia covers AI avatars.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Replika and Synthesia actually diverge.

Attributes where Replika and Synthesia differ
AttributeReplikaSynthesia
PlatformsIos, Android, WebWeb
CategoryAIVideo Production
Founded20162017

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

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 Replika

  • Conversational AI
  • Memory
  • Emotional support
  • Voice calls
  • AR features
  • Mobile apps
  • Ios support
  • Android support

Only in Synthesia

  • AI avatars
  • 140+ languages
  • Video templates
  • Brand customization
  • API access
  • LMS integrations
  • PowerPoint
  • Api support

Both cover

  • Web support

What people use each for

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

Replika

  • ai tools managementnot Synthesia
  • Workflow automationnot Synthesia
  • Reportingnot Synthesia

Synthesia

  • Training video creation with AI avatarsnot Replika
  • Multilingual video localisation with AI dubbingnot Replika
  • Enterprise video production and managementnot Replika

Where each one falls short

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

Replika

  • Pricing not published on main website or pricing page

Synthesia

  • Free plan limited to 10 minutes of video per month
  • Starter plan limited to 10 minutes of video per month
  • Creator plan capped at 30 minutes of video per month
  • SSO/SAML authentication restricted to Enterprise tier

Pricing, plan by plan

Replika

Free
  • FreeFree
    • Basic conversations
    • Memory
  • Pro$7.99/month
    • All features
    • Voice calls
    • AR

Synthesia

Free
  • BasicFree
    • 1,200 credits per month
    • Up to 10 minutes of video per month
    • 9 AI avatars
  • Starter$29/month
    • 14,500 credits per year
    • Up to 120 minutes of video per year
    • 125+ AI avatars
  • Creator$89/month
    • 44,000 credits per year
    • Up to 360 minutes of video per year
    • 180+ AI avatars

Which should you pick?

Choose Replika if

  • You need conversational ai.
  • You want to start without paying.
  • You work on Ios, Android, Web.
  • You also want memory.
Replika review

Choose Synthesia if

  • You need ai avatars.
  • You want to start without paying.
  • You also want 140+ languages.
Synthesia review

Questions people ask

Is Replika or Synthesia better?
Neither clearly leads. Replika starts at Free and Synthesia at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Replika or Synthesia?
Replika starts at Free and Synthesia at Free.
Does Replika or Synthesia run on more platforms?
Replika runs on Ios, Android, Web. Synthesia runs on Web.
Can I use Replika for free?
Both have a free tier, so you can try either at no cost before committing.
What is Replika best used for?
Replika is most often used for ai tools management, workflow automation, reporting. Of those, ai tools management and workflow automation are not what Synthesia is typically brought in for.
What can Replika do that Synthesia cannot?
Replika covers Conversational AI, Memory, Emotional support, Voice calls. Synthesia covers AI avatars, 140+ languages, Video templates, Brand customization. Both handle Web support.

Answered from the vendors’ own pages

Replika: How much does Replika cost?

Replika does not publish specific pricing information on its website. The app directs users to get the application, suggesting a subscription model exists, but pricing tiers and costs are not disclosed on the public site.

Source
Synthesia: How much does Synthesia cost?

Synthesia offers a free Basic plan with 10 minutes of video per month, Starter at $29 per month with 120 minutes per year, and Creator at $89 per month with 360 minutes per year. Annual billing provides 38% savings. Enterprise plans are available with custom pricing.

Source
Synthesia: What is included in Synthesia's free plan?

The free Basic plan includes 1,200 credits per month (approximately 10 minutes of video), 9 AI avatars, 3 personal avatars, and access to 160+ languages and voices. No credit card is required.

Source
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