20+ Best Alternatives to Sieve in 2026

Looking for an alternative to Sieve? Below are 20 AI startups working in the same space — ranked by our Neuron score so the most credible options come first. Each card shows what makes the tool a viable substitute, pricing signals, and funding stage.

1. 1

   Runware

   💰 $66M

   One API for fast generative AI inference

   Why it's similar: Shares categories with Sieve — AI Video, AI Developer Tools.

   💵 Free

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2. 2

   fal

   💰 $220M

   Fastest generative-media inference for developers

   Why it's similar: Shares categories with Sieve — AI Video, AI Developer Tools.

   💵 Usage-based

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3. 3

   Cursor

   💰 $7.6B

   The AI code editor built for productive engineers.

   Why it's similar: Shares categories with Sieve — AI Developer Tools.

   💵 Free · From $20/mo

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4. 4

   OpenAI

   💰 $193.3B

   Creator of ChatGPT, GPT-4, and the leading frontier AI lab.

   Why it's similar: Shares categories with Sieve — AI Developer Tools.

   💵 Free · From $20/mo

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5. 5

   Harvey

   💰 $1.7B

   The AI platform for elite law firms.

   Why it's similar: Shares categories with Sieve — AI Developer Tools.

   💵 Paid

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6. 6

   Moonvalley

   💰 $154M

   Los Angeles-based AI research company building Marey, a production-grade generative video

   Why it's similar: Shares categories with Sieve — AI Video.

   💵 Free

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7. 7

   Lovable

   💰 $542M

   The AI Fullstack Engineer that ships full-stack applications 20x faster than writing code

   Why it's similar: Shares categories with Sieve — AI Developer Tools.

   💵 Free · From $25/mo

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8. 8

   Animaj

   💰 $192M

   AI-powered kids' media company behind Pocoyo, with $192M raised to take on Disney

   Why it's similar: Shares categories with Sieve — AI Video.

   💵 Enterprise · Contact sales

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9. 9

   xAI

   💰 $56B

   AI designed to understand the universe

   Why it's similar: Shares categories with Sieve — AI Developer Tools.

   💵 Paid

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10. 10

    AIsphere

    💰 $660M

    Beijing-based company behind PixVerse, a fast-growing AI video generation platform for

    Why it's similar: Shares categories with Sieve — AI Video.

    💵 Free

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11. 11

    Superblocks

    💰 $60M

    Enterprise AI app platform with Clark, an agent that builds governed internal apps

    Why it's similar: Shares categories with Sieve — AI Developer Tools.

    💵 Free

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12. 12

    Stainless

    💰 $35M

    Generates production-grade SDKs, docs and MCP servers from your OpenAPI spec

    Why it's similar: Shares categories with Sieve — AI Developer Tools.

    💵 Free

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13. 13

    Swimm

    💰 $33.3M

    AI-powered code documentation and legacy modernization built on static analysis

    Why it's similar: Shares categories with Sieve — AI Developer Tools.

    💵 Contact_sales

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14. 14

    Unblocked

    💰 $30M

    AI context engine giving developers and coding agents your codebase's tribal knowledge

    Why it's similar: Shares categories with Sieve — AI Developer Tools.

    💵 Free trial

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15. 15

    Macroscope

    💰 $40M

    AI codebase intelligence from the Periscope founders — status, review, and answers

    Why it's similar: Shares categories with Sieve — AI Developer Tools.

    💵 Free · From $30/mo

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16. 16

    Flawless

    💰 $33.5M

    Assistive AI film editing for dialogue sync, performance editing, and visual dubbing

    Why it's similar: Shares categories with Sieve — AI Video.

    💵 Enterprise · Contact sales

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17. 17

    Cognition

    💰 $2.5B

    Applied AI lab building Devin, the AI software engineer.

    Why it's similar: Shares categories with Sieve — AI Developer Tools.

    💵 Free · From $500/mo

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18. 18

    MiniMax

    💰 $2.2B

    Chinese AI lab behind Hailuo video and Talkie companions.

    Why it's similar: Shares categories with Sieve — AI Developer Tools.

    💵 Freemium

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19. 19

    Hugging Face

    💰 $970M

    The AI community building the future of machine learning.

    Why it's similar: Shares categories with Sieve — AI Developer Tools.

    💵 Free · From $9/mo

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20. 20

    Rebellions

    💰 $850M

    Rebellions provides high-performance AI inference infrastructure, enabling efficient and scalable AI deployment for real-world applications.

    Why it's similar: Shares categories with Sieve — AI Developer Tools.

    💵 Enterprise · Contact sales

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