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AI21 LabsIsraeli frontier AI lab; first commercial Mamba-Transformer hybrid (Jamba); enterprise-focused with Wordtune consumer brand
Valuation (Series D May 2025)
$1.4B
Series D at roughly the Nov 2023 valuation
Annualized Revenue (2025)
~$50M
enterprise Jamba + Maestro + Wordtune; small relative to US frontier peers
Jamba Architecture
Mamba-Transformer hybrid (256K context)
First commercial Mamba-Transformer hybrid model (Mar 2024); long-context efficiency
Founder Pedigree
Amnon Shashua (Mobileye + OrCam founder)
Mobileye sold to Intel for $15B in 2017; founder track record drives Israeli capital convergence
Total raised: ~$636M+ · Latest valuation: $1.4B
| Round | Date | Amount | Valuation | Key Investors |
|---|---|---|---|---|
| Seed / Early | 2017-2018 | ~$9.5M | - | PitangoBen Horowitz |
| Series A | 2019 | $25M | - | PitangoWalden CatalystAhren Innovation Capital |
| Series B | Jul 2022 | $64M | $664M | Walden Catalyst (lead)PitangoTPY CapitalSCB10X+1 more |
| Series C | Nov 2023 | $208M | $1.4B | NVIDIAWalden CatalystPitangoSCB10X+2 more |
| Series C Extension | Aug 2024 | $53M | - | NVIDIAGoogleWalden Catalyst |
| Series D | May 2025 | $300M | ~$1.4B | NVIDIA (lead)Alphabet / Googleexisting investors |
| Product | Type | Status |
|---|---|---|
| Jamba 1.5 Large + Mini | Mamba-Transformer hybrid with 256K context | GA (open weights) |
| AI21 Studio | Developer API for Jamba + Jurassic models | GA |
| Maestro | Multi-agent orchestration product for enterprise workflows | GA |
| Wordtune | Consumer writing-assistant brand (10M+ users) | GA |
| Contextual Answers | Enterprise RAG product with 256K-context Jamba | GA |
Series C + D lead investor; Jamba models distributed via NVIDIA NIM microservices; reported acquisition interest (Dec 2025).
Series C extension + Series D investor; Vertex AI distribution path.
Jamba models available via AWS Bedrock; enterprise cloud distribution.
Series B + C lead; deep Israeli + global deep-tech thesis.
Series B + C strategic investor; Asia-Pacific enterprise distribution.
Series B + C investor; media-industry enterprise customer signal.
Yoav Shoham (Stanford emeritus), Ori Goshen, and Amnon Shashua (Mobileye founder, OrCam founder) launch AI21 in Tel Aviv
Developer platform with Jurassic-1 / Jurassic-2 proprietary models; one of the earliest non-OpenAI LLM APIs
Consumer writing assistant; reaches 10M+ users by 2024
Walden Catalyst leads $64M; AI21 establishes itself as Israel's flagship AI company
$208M raise with NVIDIA + Google as strategic investors; Israeli sovereign-AI thesis
First commercial Mamba-Transformer hybrid architecture model; 256K context window, open-weights
Multi-agent orchestration product layered on top of Jamba models; targets agentic enterprise workflows
$300M led by NVIDIA and Alphabet, at roughly the prior valuation; lifts total funding to ~$636M
NVIDIA reportedly explored acquiring AI21 for ~$3B (reported, not confirmed)
Israeli lab founded 2017, one of the oldest commercial LLM labs. Builder of the Jamba (state-space model) family with strong long-context positioning. Enterprise focus; available via the AI21 Studio API plus AWS Bedrock and other clouds. Series C closed at approximately $1.4B valuation in 2023. AI21 Labs was founded in 2017, is headquartered in Tel Aviv, Israel and employs ~300.
AI21 Labs has raised ~$636M+ in total at a $1.4B valuation, based on the funding rounds Sterling tracks.
Sterling groups AI21 Labs in the AI Software sector, alongside OpenAI (private), Anthropic (private), SpaceXAI (private), Mistral AI (private), DeepSeek (private) and Cohere (private).
If you are researching AI21 Labs, also look at Alibaba (Qwen), Tencent (Hunyuan) and Baidu (Ernie). You can compare all of them side by side or browse the full AI Software sector on Sterling.
