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Gamma vs System One API

Features, pricing, ratings, and pros and cons, side by side.

System One API logo

System One API

Hosted API returning structured choices, scores and probabilities for AI agent decisions

Free trial
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Verdict

Gamma is listed under Productivity and System One API under Developer Tools. Gamma scores higher in FinderAtlas's editorial review (8.4 vs 7.3 out of 10). Only Gamma has a free plan or trial.

Best overall

Gamma

  • Startup founders
  • Marketers
  • Sales teams
  • Educators and trainers

Choose Gamma if

  • You want a tool built for pitch decks.
  • Generates a full deck, document or webpage from a single prompt.
  • Card layout adapts to desktop and mobile screens without manual slide alignment.

Choose System One API if

  • You want a tool built for routing and triage of requests.
  • Pay-as-you-go credits with no subscription and no expiry.
  • Failed calls are not charged.
Best value
Gamma
Best for beginners
Gamma
Best for business
Gamma

Features

16 features compared.

  • Prompt-to-deck generation
    Gamma
    Available
    System One API
    Not available
  • Card-based layout
    Gamma
    Available
    System One API
    Not available
  • AI editing and restyling
    Gamma
    Available
    System One API
    Not available
  • AI images
    Gamma
    Available
    System One API
    Not available
  • Export and sharing
    Gamma
    Available
    System One API
    Not available
  • Website publishing
    Gamma
    Available
    System One API
    Not available
  • Analytics and access control
    Gamma
    Available
    System One API
    Not available
  • API and connectors
    Gamma
    Available
    System One API
    Not available
  • Choice
    Gamma
    Not available
    System One API
    Available
  • Score
    Gamma
    Not available
    System One API
    Available
  • Noul
    Gamma
    Not available
    System One API
    Available
  • Multi-question requests
    Gamma
    Not available
    System One API
    Available
  • Model catalogue
    Gamma
    Not available
    System One API
    Available
  • TypeScript SDK
    Gamma
    Not available
    System One API
    Available
  • Idempotency and error handling
    Gamma
    Not available
    System One API
    Available
  • Credit billing
    Gamma
    Not available
    System One API
    Available

Pricing

Plans as listed by each vendor. Check their sites for current prices.

  • Pricing model
    Gamma
    Freemium
    System One API
    Free trial
  • Free plan
    Gamma
    Yes
    System One API
    No
  • Starting price
    Gamma
    $0
    System One API
    $5.99
  • Plans
    Gamma
    6 plans
    System One API
    3 plans

Gamma plans

  • Free

    $0

    400 one-time AI credits that do not refresh

    • 400 AI credits
    • 10 cards per prompt
    • Basic image models
    • Made with Gamma badge

  • Plus

    $12/month

    Removes the Gamma badge and adds 1,000 monthly credits

    • 1,000 credits per month
    • 100 cards per prompt
    • Advanced image models
    • No Gamma badge

  • Pro

    Most popular

    $25/month

    4,000 monthly credits plus API access and custom domains

    • 4,000 credits per month
    • API access
    • Premium image models
    • 10 custom domains
    • Detailed analytics
    • Password protection

  • Ultra

    $100/month

    20,000 monthly credits and access to the most advanced models

    • 20,000 credits per month
    • API access
    • Ultra image models
    • 100 custom domains
    • Custom fonts

  • Business

    $40/user/mo

    Billed annually ($480 per seat per year)

    • SSO
    • SOC 2 documentation
    • 10,000 credits per seat
    • Shared workspace credits

  • Enterprise

    Custom/annual

    Annual agreement for larger organizations; contact sales

    • Custom credits
    • Advanced admin controls
    • SCIM
    • Invoiced billing
    • Dedicated onboarding

System One API plans

  • Starter

    $5.99/one-time

    5,000 prepaid decision credits.

    • 5,000 credits
    • Choice and Score and Noul
    • SDK and playground access
    • Failed inference refunded

  • Builder

    Most popular

    $19.99/one-time

    20,000 prepaid decision credits.

    • 20,000 credits
    • Choice and Score and Noul
    • SDK and playground access
    • Failed inference refunded

  • Scale

    $99.99/one-time

    120,000 prepaid decision credits.

    • 120,000 credits
    • Choice and Score and Noul
    • SDK and playground access
    • Failed inference refunded

Our ratings

Scored out of 10 by the Finder Atlas editorial team. Last reviewed October 2026.

Gamma
8.4overall
System One API
7.3overall

  • Presentation Generation Speed

    Gamma
    8.8
    System One API
    Not rated

  • Layout & Aesthetic Polish

    Gamma
    8.5
    System One API
    Not rated

  • Export Versatility (PPTX/PDF)

    Gamma
    7.8
    System One API
    Not rated

  • Mobile Responsiveness

    Gamma
    8.0
    System One API
    Not rated

  • Ease of Use

    Gamma
    9.0
    System One API
    Not rated

  • API Design

    Gamma
    Not rated
    System One API
    8.0

  • Documentation Clarity

    Gamma
    Not rated
    System One API
    7.8

  • Pricing Transparency

    Gamma
    Not rated
    System One API
    8.5

  • Maturity & Reliability

    Gamma
    Not rated
    System One API
    5.8

  • Use Case Breadth

    Gamma
    Not rated
    System One API
    6.2

Scores weigh documented features, plan value, platform coverage, integrations and user feedback. A missing score means we have not rated that area yet.

Pros and cons

Gamma

Pros

  • Generates a full deck, document or webpage from a single prompt
  • Card layout adapts to desktop and mobile screens without manual slide alignment
  • Exports to PowerPoint and PDF and shares by web link
  • Free plan available, and Plus at $10 per month removes the Gamma badge
  • API and ChatGPT, Claude and Slack connectors for automation

Cons

  • Free credits are one-time (400) and the free plan is limited to 10 cards per prompt
  • Free exports carry a "Made with Gamma" badge
  • API access requires Pro ($20 per month) or higher
  • Ultra costs $100 per month and is monthly only, with no annual option
  • Users on review sites report problems with billing, credit use and slow support

System One API

Pros

  • Pay-as-you-go credits with no subscription and no expiry
  • Failed calls are not charged
  • Public model catalogue with prices and limits
  • Structured outputs with per-option probabilities
  • Open-source MIT-licensed TypeScript SDK

Cons

  • Early-stage project: the SDK repository has very few GitHub stars and the company is not identified on the site
  • No published latency, uptime or accuracy guarantees
  • Limited to classification, scoring and yes/no style decisions rather than generation
  • Hosted models are the vendor's own and independent benchmarks are not provided

Platforms

  • Web
    Gamma
    Supported
    System One API
    Supported
  • Windows
    Gamma
    Not supported
    System One API
    Not supported
  • macOS
    Gamma
    Not supported
    System One API
    Not supported
  • iOS
    Gamma
    Not supported
    System One API
    Not supported
  • Android
    Gamma
    Not supported
    System One API
    Not supported
  • API
    Gamma
    Supported
    System One API
    Supported
  • Browser Extension
    Gamma
    Not supported
    System One API
    Not supported

Integrations

Gamma

6 integrations
  • ChatGPT
  • Claude
  • Slack
  • MCP server
  • PowerPoint export
  • PDF export

System One API

No integrations listed.

Company

  • Company
    Gamma
    Gamma
    System One API
    Not listed
  • Founded
    Gamma
    2020
    System One API
    Not listed
  • Headquarters
    Gamma
    San Francisco, CA
    System One API
    Not listed
  • Monthly users
    Gamma
    70M+ users
    System One API
    Not listed
  • Listing
    Gamma
    Claimed
    System One API
    Not claimed

Frequently asked questions

Is Gamma better than System One API?

It depends on your workflow. Gamma is built for pitch decks. System One API is built for routing and triage of requests.

What are the key feature differences between Gamma and System One API?

Gamma: Generate presentations, documents and websites from a prompt with an AI design partner. System One API: Hosted API returning structured choices, scores and probabilities for AI agent decisions.

Does Gamma or System One API have a free plan?

Gamma has a free plan or trial; System One API is paid only.

Which is cheaper, Gamma or System One API?

Gamma starts at $0 and System One API starts at $5.99. See the pricing table above for what each tier includes.