Which AI companies are growing the fastest in 2026?

By revenue: OpenAI, Anthropic, xAI and Perplexity lead consumer + API growth, while CoreWeave, Lambda and Nebius lead GPU-cloud growth. On the inference side, Cerebras, Groq and SambaNova are growing fastest off a smaller base.

What are the most important recent AI IPOs?

CoreWeave (CRWV) listed on Nasdaq in March 2025 and remains the bellwether AI-cloud IPO. Cerebras Systems filed its S-1 in 2024 and is the most-watched AI-chip IPO of 2026. Nebius spun out of Yandex and trades on Nasdaq. Astera Labs (ALAB) is a key AI-networking IPO from 2024 still re-rating in 2026.

Is OpenAI publicly traded?

No. OpenAI remains private as of 2026, though its tender offers and structured share sales have repeatedly reset secondary-market valuations into the hundreds of billions of dollars. An IPO has been widely speculated but not announced.

What AI IPOs are expected in 2026?

Cerebras Systems is the most-anticipated chip IPO. Databricks, Anthropic and xAI are watched on the model/data side. Perplexity and Cohere are frequently named on the application side. None are guaranteed; treat all as speculation until S-1 filings are public.

How should I evaluate an AI IPO?

Look at revenue concentration (how many customers drive >50% of revenue), gross margin (GPU-cloud margins differ sharply from SaaS), GPU supply commitments, customer renewal economics, and exposure to a single hyperscaler or foundation-model vendor.

Fastest-Growing AI Companies & Recent AI IPOs (2026)

How we picked these

We weight three signals: annualized revenue growth, paid-customer growth, and capacity commitments (GPU contracts, wafer reservations, enterprise MSAs). Hype alone doesn't qualify a company; revenue or signed capacity does.

The 2026 shortlist

Company	Category	Status	Why it's growing
OpenAI	Foundation models	Private	Annualized revenue past $20B in 2026 driven by ChatGPT, GPT-5.x APIs, Enterprise and Sora 2; secondary-market valuation in the high hundreds of billions.
Anthropic	Foundation models	Private	Claude 4.x / Fable / Mythos enterprise adoption; revenue tripling year-over-year on Bedrock, Vertex and direct API.
xAI	Foundation models	Private	Grok 4/5 plus the Colossus 2 supercluster; tight integration with X and Tesla data pipelines.
Perplexity AI	AI search	Private	Fastest-growing AI search product; Comet browser and Pro subscription expansion.
Mistral AI	Open-weights models	Private	EU sovereign-AI darling; Mistral Large 3 and Codestral driving enterprise European deployments.
Cohere	Enterprise LLMs	Private	Command R+ family; deep enterprise + government deals, especially in Canada and the UK.
CoreWeave	GPU cloud	Public · NASDAQ:CRWV	Largest pure-play AI-cloud IPO to date; multi-year capacity commitments with hyperscalers and labs.
Nebius Group	GPU cloud	Public · NASDAQ:NBIS	Yandex-spinoff hyperscaler-grade GPU capacity in Europe; rapid revenue ramp.
Lambda	GPU cloud	Private	Developer-friendly GPU cloud; raised mega-rounds to scale Blackwell capacity.
Cerebras Systems	AI chips	Filed S-1	WSE-3 wafer-scale inference engine; fastest hosted-inference numbers on Llama and DeepSeek classes; most-watched 2026 chip IPO.
Groq	AI chips	Private	LPU inference at sub-100ms latencies; Series E into 2026, hyperscaler partnerships expanding.
SambaNova Systems	AI chips	Private	Enterprise-on-prem AI appliances; growing share in regulated industries.
Astera Labs	AI networking	Public · NASDAQ:ALAB	Retimers and Scorpio fabric switches sitting inside Blackwell racks.
Together AI	Open-model inference	Private	Hosted Llama, Mixtral, DeepSeek and Qwen inference; fine-tuning APIs; aggressive pricing on open-weights.
Fireworks AI	Open-model inference	Private	Specialized in low-latency function-calling and structured-output inference for agent workloads.
Hugging Face	ML platform	Private	De-facto registry for open models and datasets; enterprise Inference Endpoints scaling fast.
Databricks	Data + AI platform	Private	Mosaic-era foundation-model training plus the core lakehouse; perennial near-IPO candidate.
Glean	Enterprise AI search	Private	Fastest-growing workplace AI assistant; deep SaaS connector ecosystem.
Harvey	Vertical AI (legal)	Private	Default AI copilot inside top-100 law firms; multi-tenant + on-prem deployments.
Sierra	Agentic CX	Private	Voice + chat AI agents replacing call-center tiers; expanded into Europe in 2025–26.

Recent AI IPOs worth knowing

CoreWeave (CRWV) — March 2025 Nasdaq listing; the benchmark AI-cloud IPO. Multi-year hyperscaler and lab contracts back the revenue ramp.
Astera Labs (ALAB) — 2024 IPO; PCIe retimers and Scorpio fabric switches sit inside every Blackwell rack.
Nebius Group (NBIS) — Yandex spinoff trading on Nasdaq; EU-based GPU cloud scaling aggressively.
Tempus AI (TEM) — 2024 IPO; clinical AI on a large oncology dataset.
Cerebras Systems (filed) — S-1 filed in 2024; the most-watched chip IPO of 2026.

Private companies most likely to IPO next

Databricks, Anthropic, xAI, Perplexity, Mistral, Cohere, Groq, and Together AI are the most-named near-term IPO candidates. Treat the list as speculation until a public S-1 drops — many of these have raised enough secondary liquidity that they can stay private longer than past cycles allowed.

What this means for builders

If you're picking a stack in 2026: foundation-model risk is real (see what just happened with Anthropic's Fable 5 and Mythos 5 — full story here), so build with portability in mind. Pair a frontier API with an open-weights fallback served by Together, Fireworks or your own DGX Spark.

How we picked these

The 2026 shortlist

Recent AI IPOs worth knowing

Private companies most likely to IPO next

What this means for builders

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