Fireworks AI
Fireworks AI in the enterprise
As of November 8, 2026. Every figure links to its source; company-reported numbers are labeled as such.
Fireworks AI sells computing for running and customizing open AI models. Businesses either pay per word processed on shared servers, rent dedicated chip capacity by the hour, or pay to train a version of an open model on their own data. Its pitch is that a tuned open model can match a closed model from OpenAI or Anthropic on a specific task at a fraction of the cost, and that the customer owns the result. Its best-known customers are software companies that build AI into their products, such as Cursor, Notion, GitLab, Harvey, Shopify and Uber. It is also available through Microsoft Foundry on Azure and through AWS, giving large companies a way to buy it from cloud providers they already use.
By the company's own figures, the business is large and growing fast. Annualized revenue passed $1 billion in July 2026, up from more than $280 million in October 2025, and daily volume rose to more than 40 trillion tokens (the small units of text that AI models read and write). Fireworks says more than 10,000 companies use it and that 95% of its volume comes from models customized for a customer. None of these numbers is audited. Outside analysts at Sacra estimate gross margin at about 50%, which is low for software and reflects the cost of renting Nvidia chips.
What to watch: whether new products for large enterprises, including Fireworks Sovereign (its software running in a customer's own data center), budget controls and audit logs, broaden its customer base beyond AI-native startups. Watch also how it handles price competition from the big clouds and rivals such as Together AI and Baseten, and whether customers stay after the October 2026 incident in which an intruder captured API keys stored in some customer accounts. The hiring of Meta's Dave Wehner as CFO and reported talks at a $30-40 billion valuation point to a company preparing for much larger scale.
Key numbers
| Measure | Figure | As of | Source |
|---|---|---|---|
| Annualized revenue run rate (company-reported) | More than $1 billion, about 5x a year earlier | Jul 2026 | Fireworks Raises a $1.5 Billion Series D to Lead the Specialized Intelligence Revolution (Business Wire) |
| Annualized revenue run rate at prior round (company-reported) | More than $280 million | Oct 2025 | Fireworks Series C announcement (Fireworks AI) |
| Daily token volume (company-reported) | More than 40 trillion, up from 15 trillion | Jul 2026 | Fireworks Raises a $1.5 Billion Series D to Lead the Specialized Intelligence Revolution (Business Wire) |
| Share of volume from customer-customized models (company-reported) | 95% | Jul 2026 | Fireworks Raises a $1.5 Billion Series D to Lead the Specialized Intelligence Revolution (Business Wire) |
| Companies using Fireworks (company-reported) | More than 10,000 | Nov 2026 | Fireworks AI homepage |
| Gross margin (outside estimate) | About 50%, with a 60% target | 2026 | Fireworks AI revenue, valuation and funding (Sacra) |
| GPUs managed in customer environments (company-reported) | More than 25,000 | Nov 2026 | Fireworks Announces Faster Agent Inference and Sovereign Deployment (Unite.AI) |
What it sells to businesses
| Serverless inference | Pay-per-use access to hundreds of open AI models on shared servers, with new open models usually added within hours of release. |
| Dedicated deployments | Reserved Nvidia chip capacity for one customer, billed by time, for steady high-volume or latency-sensitive workloads. |
| Training and fine-tuning (Training API) | Tools to retrain open models on a customer's own data, including reinforcement learning, so the customer owns a specialized model; generally available since August 2026. |
| Fireworks Sovereign | Fireworks' serving software run inside a customer's own cloud or data center so data never leaves it, with optional overflow to Fireworks' cloud; in private preview since November 2026. |
| Enterprise controls | Governance, spending limits and exportable audit logs (generally available), with regional data controls and customer-managed encryption in preview. |
| Fireworks Nexus | A per-seat subscription that routes developers' coding tools across open and closed models, from $8 a month. |
| Cloud marketplace access | Fireworks-served models offered inside Microsoft Foundry on Azure (public preview) and through a joint go-to-market agreement with AWS. |
Named customers and deployments
| Customer | What they did | When | Source |
|---|---|---|---|
| Heidi | Health-tech company retrained Nvidia's Nemotron 3 Ultra model on Fireworks for its Heidi Evidence clinical search feature and deployed it on dedicated Fireworks capacity; in final evaluation before production rollout (company case study). | Oct 2026 | Heidi trains and deploys NVIDIA Nemotron 3 Ultra on Fireworks (Fireworks AI) |
| GitLab | Serves all three open models in its GitLab Duo Agent Platform (Kimi K3, GLM 5.3, MiniMax M3) through Fireworks, under a zero-data-retention arrangement. | Sep 2026 | Optimize with open weight models (GitLab) |
| Harvey | Legal AI company built its first in-house model, Tenet, by retraining Moonshot's Kimi K3, doing the training work with Fireworks. | Aug 2026 | Harvey's first in-house model for legal work is here (TNW) |
| Uber, Shopify, Doximity, Revolut | Named by Fireworks as customers in its Series D announcement. | Jul 2026 | Fireworks Raises a $1.5 Billion Series D to Lead the Specialized Intelligence Revolution (Business Wire) |
| Cursor | Used Fireworks to run the inference side of reinforcement-learning training for its Composer 2 coding model across three to four clusters worldwide (company-reported case study). | Jun 2026 | Cursor Composer 2 reinforcement learning (Fireworks AI) |
| Notion | Moved AI features to smaller fine-tuned models on Fireworks, cutting response time from about 2 seconds to 350 milliseconds (vendor case study, undated). | Undated | How Notion cuts latency 4x and scales enterprise AI workflows with Fireworks AI (CaseStudies.com) |
| Samsung, DoorDash, Upwork | Named by Fireworks as customers moving AI from pilots into core operations. | Oct 2025 | Fireworks Series C announcement (Fireworks AI) |
Partnerships
| Partner | Deal | When | Source |
|---|---|---|---|
| Nvidia | Existing investor that participated in the July 2026 Series D; also named by Fireworks as a cloud partner. | Jul 2026 | Fireworks Raises a $1.5 Billion Series D to Lead the Specialized Intelligence Revolution (Business Wire) |
| Microsoft | Fireworks-served open models became available in Microsoft Foundry through a single Azure endpoint; public preview launched in March 2026. | Mar 2026 | Introducing Fireworks AI on Microsoft Foundry (Microsoft Azure Blog) |
| Amazon Web Services | Strategic collaboration agreement for joint go-to-market efforts, AWS Generative AI Competency status, and a funded proof-of-concept program for AI startups. | Nov 2025 | Fireworks expands AWS alliance (Fireworks AI) |
| AMD, MongoDB, Databricks | Named as strategic participants in the October 2025 Series C, alongside Nvidia. | Oct 2025 | Fireworks Series C announcement (Fireworks AI) |