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Software · head to head

AI21 Labs vs Zeplin

AI21 Labs logo

AI21 Labs

Software

Enterprise language AI solutions

From
Free
Rated
-
Full reviewWebsite
Zeplin logo

Zeplin

Software

Design handoff and developer collaboration

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: AI21 Labs the free allowance is $10 of credit lasting 7 days rather than an ongoing free tier; Zeplin the free plan is limited to 1 project and 100 screens and works only in a personal workspace
  • They diverge on capability: AI21 Labs covers Jamba models, Zeplin covers Design specs.

Where they differ

Only the attributes on which AI21 Labs and Zeplin actually diverge.

Attributes where AI21 Labs and Zeplin differ
AttributeAI21 LabsZeplin
Pricing modelusage-basedsubscription
PlatformsApi, CloudWeb, Desktop, Mobile
Founded20172014

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

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 AI21 Labs

  • Jamba models
  • Long context
  • RAG engine
  • Writing tools
  • REST API
  • Amazon Bedrock
  • Cloud platforms
  • Api support

Only in Zeplin

  • Design specs
  • Asset export
  • Code snippets
  • Design tokens
  • Comments
  • Version control
  • Handoff workflow
  • Accessibility checks

What people use each for

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

AI21 Labs

  • Running long-context tasks on the Jamba model familynot Zeplin
  • Building and optimising production AI agents with Maestronot Zeplin
  • Routing between models to control cost and accuracynot Zeplin
  • Long-horizon agentic tasks needing stateful workspacesnot Zeplin

Zeplin

  • Handing off design specs from Figma or Sketch to developersnot AI21 Labs
  • Sharing screens, assets and style guides with an engineering teamnot AI21 Labs
  • Reviewing and commenting on design versionsnot AI21 Labs

Where each one falls short

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

AI21 Labs

  • The free allowance is $10 of credit lasting 7 days rather than an ongoing free tier
  • Jamba Large is $2 per million input tokens and $8 per million output, so output-heavy work costs four times as much as input
  • Volume discounts, private cloud hosting and higher rate limits require a custom plan
  • Standard rate limits are not published

Zeplin

  • The free plan is limited to 1 project and 100 screens and works only in a personal workspace
  • Free plan AI reviews are capped at 3 per week
  • Role based permissions require the Advanced plan or higher
  • Single sign on, multi factor authentication, activity logs and invoiced billing are Enterprise only
  • Priority 24 hour support is Enterprise only
  • Basic plan caps screens at 1,000 per project and is priced per project rather than per seat
  • Enterprise pricing is by quote with no published rate

Pricing, plan by plan

AI21 Labs

Free
  • Free TrialFree
    • Limited usage
    • API access
  • Jamba$0.2/per-million-input-tokens
    • 256K context
    • Hybrid architecture

Zeplin

Free
  • FreeFree
    • 1 project
    • 1 workspace
    • Basic specs
  • Starter$19/month
    • Unlimited projects
    • Multiple workspaces
    • Advanced specs
  • Professional$49/month
    • Everything in Starter
    • Team collaboration
    • Admin controls

Which should you pick?

Choose AI21 Labs if

  • You need jamba models.
  • You want to start without paying.
  • You work on Api, Cloud.
  • You also want long context.
AI21 Labs review

Choose Zeplin if

  • You need design specs.
  • You want to start without paying.
  • You work on Web, Desktop, Mobile.
  • You also want asset export.
Zeplin review

Questions people ask

Is AI21 Labs or Zeplin better?
Neither clearly leads. AI21 Labs starts at Free and Zeplin at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, AI21 Labs or Zeplin?
AI21 Labs starts at Free and Zeplin at Free.
Does AI21 Labs or Zeplin run on more platforms?
AI21 Labs runs on Api, Cloud. Zeplin runs on Web, Desktop, Mobile.
Can I use AI21 Labs for free?
Both have a free tier, so you can try either at no cost before committing.
What is AI21 Labs best used for?
AI21 Labs is most often used for running long-context tasks on the jamba model family, building and optimising production ai agents with maestro, routing between models to control cost and accuracy, long-horizon agentic tasks needing stateful workspaces. Of those, running long-context tasks on the jamba model family and building and optimising production ai agents with maestro are not what Zeplin is typically brought in for.
What can AI21 Labs do that Zeplin cannot?
AI21 Labs covers Jamba models, Long context, RAG engine, Writing tools. Zeplin covers Design specs, Asset export, Code snippets, Design tokens.
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