StepFun vs Upstage

StepFun — Foundation Models · Private · $10B valuation · 2 of 2 figures sourced  |  Upstage — Foundation Models · Private · $958.8M valuation · 4 of 4 figures sourced

Relationship

StepFun Open Platform and Solar LLMs both serve buyers who need to build on a hosted model API; smaller scale (private).

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

6 of 12 capabilitiesShared product typeSmaller scale

6 of 12 capabilities — Shares agent orchestration, code generation, model inference and 3 more.

Ludbee capability tags · from the product records

Shared product type — Both ship API service, application and model API.

Ludbee product records

Smaller scale — Upstage: $958.8M valuation, against StepFun's $10B valuation.

Ludbee scale figures · valuation, market cap or revenue estimate

Aligned comparison

FieldStepFunUpstage
Valuation$10B$958.8M Upstage has 10× smaller
Employees—100
Founded20232020 3 yrs earlier
StatusPrivatePrivate match
CategoryFoundation ModelsFoundation Models match
Stack layerAI agent, API service, Application, Developer tool, Model APIAPI service, Agent platform, Application, Model API
HeadquartersShanghai, ChinaSeoul, South Korea

Capability overlap

Shared · 6

Agent orchestrationCode generationModel inferenceText generationSearch answersWorkflow automation

Not verified for Upstage · 6

Agentic codingImage generationKnowledge retrievalSpeech to textText to speechVoice agent

Recorded for StepFun. Upstage’s product records say nothing either way — a missing record is not a missing capability.

Not verified for StepFun · 1

Document extraction

Recorded for Upstage. StepFun’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

StepFun

Application

阶跃AI (StepFun AI)Application

StepFun's consumer AI assistant, available on the web and as Windows and macOS desktop clients, offering web search, knowledge-base Q&A, image creation, tool use and speech recognition.

API service

Step PlanAPI service

A subscription service from the StepFun Open Platform that supplies a monthly Credit pool for calling StepFun's flagship models from third-party coding tools and agent clients such as Claude Code, Cursor, OpenClaw, Cline and Zed.

Model API

StepFun Open PlatformModel API

API access to StepFun's text, vision, speech and image models, with credit packages and enterprise plans.

Upstage

Application

Solar ChatApplication

Research-the-web chat assistant built on Upstage's Solar LLM family, answering questions with sources.

Upstage AI SpaceApplication

Document intelligence tool that extracts, drafts and reviews document-based work; referenced in a customer testimonial as helping brokers find answers across long documents.

API service

Document ParseAPI service

API that converts PDFs and scanned documents into structured, machine-readable layout and text.

Information ExtractAPI service

API that pulls named fields out of unstructured documents such as invoices, claims and contracts.

Model API

Solar LLMsModel API

Upstage's family of agent-oriented language models -- Solar Pro 4 as a hosted API for terminal tasks, document workflows and multi-turn tool use, plus the open-weight Solar Open 2 (250B MoE, 15B active params) for self-hosting.

No counterpart

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

AI agent

StepClawAI agent

A one-click cloud-deployed AI agent offered inside the 阶跃AI assistant that interprets instructions and carries out tasks autonomously.

Developer tool

阶跃星辰 AI Studio (StepFun AI Studio)Developer tool

A browser-based workspace for building, testing and deploying AI applications on StepFun's models, with a playground, a showcase library of example apps and a personal asset library.

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

Agent platform

Upstage StudioAgent platform

Workspace for building and running document-processing agents from Upstage's parsing and extraction steps.

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