Fireworks AI vs Lambda

Fireworks AI — Infrastructure · Private · $17.5B valuation · 4 of 4 figures sourced  |  Lambda — Infrastructure · Private · $1.5B raised · 2 of 2 figures sourced

Relationship

Fireworks Inference and Lambda Inference do comparable work on model hosting; both also serve buyers who need to serve a model in production; similar scale (private).

Assembled from the recorded fields for this pair, not hand-checked. The comparison below is read from each company’s own profile.

3 of 5 capabilitiesShared product type

3 of 5 capabilities — Shares model hosting, model inference and model training.

Ludbee capability tags · from the product records

Shared product type — Both ship model API.

Ludbee product records

Aligned comparison

FieldFireworks AILambda
Size$17.5B valuation$1.5B raised different basis
Employees115—
Founded20222012 10 yrs earlier
StatusPrivatePrivate match
CategoryInfrastructureInfrastructure match
Stack layerAPI service, Model APIInfrastructure service, Model API
HeadquartersSan Mateo, USASan Francisco, USA

Capability overlap

Shared · 3

Model hostingModel inferenceModel training

Not verified for Lambda · 2

Agent orchestrationSpeech to text

Recorded for Fireworks AI. Lambda’s product records say nothing either way — a missing record is not a missing capability.

Not verified for Fireworks AI · 2

AI compute hardwareGPU cloud

Recorded for Lambda. Fireworks AI’s product records say nothing either way — a missing record is not a missing capability.

Products, side by side

Algorithmic pairing — assembled from recorded fields, not hand-checked

Fireworks AI

Model API

Fireworks AIModel API

Hosted API for serving and fine-tuning open-weight models, billed per token.

Fireworks NexusModel API

Drop-in API endpoint that routes each request across models to trade cost against quality.

Lambda

Model API

Lambda InferenceModel API

Hosted inference endpoints for open-weight models on Lambda's own GPU fleet, billed per token.

No counterpart

Fireworks AI sells these in a stack layer with no product recorded for Lambda yet — nothing on the other side to compare them against.

API service

Fireworks InferenceAPI service

Serving for frontier open models and for a customer's own post-trained versions of them, on an inference engine tuned at each layer.

Fireworks Speech RecognitionAPI service

Real-time and batch speech-to-text on Fireworks, aimed at voice workflows that need low-latency transcription at scale.

Fireworks TrainingAPI service

Training and retraining of custom models on Fireworks, offered across several training surfaces and served on the same platform.

Lambda sells these in a stack layer with no product recorded for Fireworks AI yet — nothing on the other side to compare them against.

Infrastructure service

Lambda 1-Click ClustersInfrastructure service

Self-serve GPU clusters from 16 to 2,000+ NVIDIA B200 or H100 GPUs, provisioned without a sales cycle for training, fine-tuning and large inference runs.

Lambda CloudInfrastructure service

On-demand NVIDIA instances for training, fine-tuning and serving — 1 to 8 GPUs launched in minutes with self-serve access — billed by the minute with no egress charge, alongside the 1-Click Clusters and liquid-cooled superclusters Lambda sells for larger runs.

Lambda On-Demand InstancesInfrastructure service

Hourly NVIDIA GPU instances — H100, H200, B200 and A100 — launched in minutes with no egress fees.

Lambda SuperclustersInfrastructure service

Rents dedicated large-scale AI training and inference GPU clusters at supercomputer scale.