Together AI
Open-source AI cloud: inference, training, fine-tuning, and GPU clusters for builders standardizing on open-weight models
PRIVATESan Francisco, CA~250Founded 2022~$535M raised$3.3B (Feb 2025 closed); ~$7.5B reported in talks (Mar 2026) valuationwww.together.ai
SectorsAI Software
Market Metrics
Annualized Revenue (Feb 2026)
~$1B
up from ~$618M (end-2025); ~3x from mid-2025
Valuation
$3.3B closed / $7.5B in talks
Feb 2025 Series C closed; $7.5B reported in talks (Mar 2026)
Open-Source Model Catalog
200+ models served
Largest catalog of production-ready open-weight model inference in the industry
Co-Founder Pedigree
3 Stanford profs + serial founder
Percy Liang, Chris Re, Ce Zhang (Stanford) + Vipul Ved Prakash (Topsy founder, Apple acquihire)
Updated at 2026-Q1
Funding History
Total raised: ~$535M · Latest valuation: $3.3B (Feb 2025 closed); ~$7.5B reported in talks (Mar 2026)
| Round | Date | Amount | Valuation | Key Investors |
|---|---|---|---|---|
| Seed | Jun 2022 | $20M | - | Lux Capital (lead)FactorySCB10XMATH Venture Partners+2 more |
| Series A | May 2023 | $102.5M | $500M | Kleiner Perkins (lead)NEAProsperity7Lux Capital+1 more |
| Series A Extension | Nov 2023 | $106M | - | SalesforceCoatueNEA |
| Series B | Mar 2024 | $106M | $1.25B | Salesforce Ventures (lead)CoatueKleiner PerkinsLux Capital+1 more |
| Series C | Feb 2025 | $305M | $3.3B | General Catalyst (lead)Prosperity7Salesforce VenturesNVIDIA+1 more |
| New Round (reported) | Mar 2026 (reported) | ~$1B (in talks) | $7.5B (reported) | Per The Information; round in talks, not closed |
Updated at 2026-Q1
Product Specifications
| Product | Type | Status |
|---|---|---|
| Together Inference | High-throughput inference for 200+ open-source models | GA |
| Together Cloud (GPU Clusters) | On-demand H100, H200, B200 clusters with NVLink + InfiniBand | GA |
| Together Fine-tuning | Custom model fine-tuning service on Together infrastructure | GA |
| Together Training | Pre-training service for full open-source models | GA |
| Together Code (DeepCoder-14B) | Open-weight coding model | Released (Apr 2025) |
| RedPajama Dataset | Open-source training corpus | Released (2023) |
Updated at 2026-Q1
Partnerships & Investors
NVIDIAStrategic / Investor / Supplier
Series C investor; Blackwell B200 early-access cloud; Together a core NVIDIA AI Enterprise partner.
SalesforceStrategic / Investor
Series A, A2, B investor; Together inference powers some Salesforce Einstein Trust Layer model routing.
Prosperity7 (Saudi Aramco)Sovereign Investor
Series C co-lead; Saudi sovereign-tech thesis.
Cartesia / Pika / Cresta / ArceeCustomer
Generative-AI startups standardizing on Together for inference + training infrastructure.
Snorkel + Together AI Compound AIStrategic
Compound-AI system reference architectures co-developed with research labs.
Updated at 2026-Q1
Key Milestones
Jun 2022
Company Founded
Vipul Ved Prakash (Topsy, acquired by Apple), Ce Zhang (Stanford), Chris Re (Stanford), Percy Liang (Stanford) launch Together AI
2023
RedPajama Dataset
Together releases the RedPajama open dataset replicating the LLaMA training mix; becomes a foundational open-source corpus
May 2023
Series A at $500M
Kleiner Perkins leads $102.5M; Together becomes the canonical open-source AI cloud
Mar 2024
Series B at $1.25B
Salesforce-led $106M; serves 200+ open-source models in inference catalog
Feb 2025
Series C at $3.3B
General Catalyst + Prosperity7 (Saudi sovereign) lead $305M; NVIDIA joins as strategic investor
Apr 2025
DeepCoder-14B Open Model
Together releases DeepCoder-14B; one of the strongest open-weight coding models
Q2 2025
NVIDIA Blackwell B200 Early Access
Together among the first GPU clouds with production-scale B200 deployment
Feb 2026
$1B Annualized Revenue
Crosses ~$1B ARR, up from ~$618M at the end of 2025; GPU rentals are the larger share, API ~30-40%
Mar 2026
$7.5B Round in Talks (reported)
Reportedly in talks to raise ~$1B at a $7.5B valuation, more than 2x the Feb 2025 round
Updated at 2026-Q1