AI21 Labs
Headquarters
Tel Aviv, IsraelFounded
2017CEO / Founder
Ori Goshen, Yoav ShohamEmployees
201-500Funding
Series D+ — $636MProducts
2 products listedAvg. AI Score
7.5/10Website
www.ai21.com/
Profile updated
About AI21 Labs
AI21 Labs is an enterprise AI company founded in 2017 by Amnon Shashua, Yoav Shoham, and Ori Goshen in Tel Aviv, Israel. The company develops foundation models and AI systems for production enterprise environments, with co-CEOs Ori Goshen and Prof. Yoav Shoham — a Stanford professor emeritus and former Google Principal Scientist — leading the organization.
The company's flagship products include the Jamba family of large language models, optimized for long-context processing, and Maestro, an agentic orchestration framework targeting reliability and cost efficiency in multi-agent pipelines and retrieval-augmented generation workflows. Enterprise customers use these systems to move AI deployments from proof-of-concept into production with an emphasis on deterministic and auditable outputs.
AI21 Labs has raised $636 million in total funding: a $64 million Series B in July 2022, a $155 million Series C in August 2023 backed by Google and Nvidia, and a $300 million Series D in May 2025 at a $1.4 billion valuation. As of 2025, the company employs approximately 220 people, with backing from investors including Google, Nvidia, Intel Capital, Samsung Next, Coatue, Pitango, and Walden Catalyst.
Specialties
Financials
Dated, source-cited figures. Estimates are marked.
Products by AI21 Labs
All products by AI21 Labs reviewed by our AI panel of experts.
AI writing assistant for rewriting, paraphrasing, and grammar correction
Foundation models and AI systems for enterprise workflows
Competitive Landscape
Who AI21 Labs competes with, and how they differ.
Offers the GPT model family and API with a much larger developer ecosystem and consumer-facing ChatGPT product, versus AI21's smaller Jamba lineup and enterprise-focused Maestro orchestration.
2 products reviewed on TopReviewed
Competes directly in enterprise LLM APIs with the Claude model family, emphasizing safety-tuned models sold via API and major cloud marketplaces, similar target segment to AI21's Jamba.
3 products reviewed on TopReviewed
Provides Gemini API models backed by Google's cloud infrastructure and multimodal capabilities, competing for the same enterprise foundation-model customers as AI21's Jamba.
6 products reviewed on TopReviewed
Distributes OpenAI models via Azure OpenAI Service with enterprise compliance and integration into Microsoft's cloud stack, an alternative procurement path to AI21's direct Jamba/Maestro offering.
9 products reviewed on TopReviewed
Meta's open-weight Llama models let enterprises self-host or fine-tune for free, contrasting with AI21's proprietary, hosted Jamba models and paid orchestration layer.
2 products reviewed on TopReviewed
European foundation model company offering open-weight and API-based LLMs at competitive pricing, positioned as a direct alternative to AI21's Jamba series for enterprise deployment.
2 products reviewed on TopReviewedCompany Timeline
Key milestones in AI21 Labs's history, with sources.
- Launch
Maestro planning and orchestration system launched
AI21 introduced Maestro, an AI planning and orchestration system aimed at reliable enterprise agent workflows, alongside the Jamba 1.6 model family.
en.wikipedia.org - Partnership
Jamba 1.5 models available on Amazon Bedrock
AI21 partnered with Amazon Web Services to make its Jamba 1.5 model family available to enterprise customers through Amazon Bedrock.
en.wikipedia.org - Launch
Jamba — first production-grade Mamba-based model
Open-weight hybrid SSM-Transformer model released under Apache 2.0 with a 256K-token context window, combining Mamba structured state space layers with attention and mixture-of-experts.
siliconangle.com - Funding
Series C completed at $208M, oversubscribed
AI21 closed its oversubscribed Series C at $208M with new investors Intel Capital and Comcast Ventures, at a $1.4B valuation, bringing total funding raised to $336M.
ai21.com - Funding
Series C — $155M at $1.4B valuation
Investors included Walden Catalyst, Pitango, SCB10X, b2venture, Samsung Next, Google, and Nvidia, lifting total capital raised to $283M.
calcalistech.com - Launch
Jurassic-2 released
Next-generation language model family with multilingual support, faster response times, and improved instruction-following, released alongside task-specific APIs.
siliconangle.com - Funding
Series B — $64M led by Ahren at $664M valuation
Round led by Ahren with participation from Walden Catalyst, Pitango, TPY Capital, Mark Leslie, and co-founder Amnon Shashua, bringing total funding to $118M.
prnewswire.com - Launch
AI21 Studio and Jurassic-1 launched
AI21 opened its developer platform AI21 Studio alongside the Jurassic-1 language model family; Jurassic-1 Jumbo, at 178B parameters, was among the largest models available to developers at the time.
businesswire.com - Launch
Wordtune launched as company exits stealth
AI21 Labs came out of stealth with Wordtune, an AI-based writing assistant that rewrites and rephrases sentences while preserving meaning. It later grew to tens of millions of users.
businesswire.com - Founded
AI21 Labs founded in Tel Aviv
Founded by Stanford professor Yoav Shoham, Ori Goshen, and Mobileye co-founder Prof. Amnon Shashua to build AI systems that combine language models with reasoning.
en.wikipedia.org
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