
OpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
#1CopilotKit records 403,148 monthly visits with +199.4% month-over-month growth and Freemium pricing. DeepL records 95,110,871 monthly visits with -1.7% growth and Freemium pricing.

Open-source frontend stack for building AI agents and copilots inside your own product
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | copilotkit.ai | deepl.com |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 403.15K (403,148) | 95.11M (95,110,871) |
| MoM Traffic Delta |
| +268.49K (+199.4%) |
| -1.66M (-1.7%) |
| Primary Market & Share | 🇺🇸 United States (18.9%) | 🇩🇪 Germany (15.8%) |
|---|
| Direct Visits / mo | 179.26K | 60.38M |
|---|
| User Rating | 4.6 | 4.7 |
|---|
| Supported Platforms | Website | Website |
|---|

Open-source frontend stack for building AI agents and copilots inside your own product
Ship a working copilot UI in minutes with drop-in components for React, Angular, Vue, iOS, and Android, or go fully headless for total control over rendering.
A general-purpose bi-directional link between your app and any agent backend, with integrations for the OpenAI Agents SDK, Claude Agent SDK, LangChain, Google ADK, AWS Strands, Mastra, and many more.
Agents return real UI — charts, forms, tables, and approval prompts rendered with your own design system on the same screen the user is already working in.
Let agents read and write application state, call your frontend functions, and pause for human approval before sensitive actions are executed.

Enterprise-grade neural machine translation, AI writing refinement, and real-time voice translation across thirty-plus global languages.
Translates whole PDF, Word (.docx), PowerPoint (.pptx), Excel (.xlsx), and HTML files up to 30 MB (Individual/Team) or 100 MB (Business/Enterprise) while keeping original fonts, tables, slides, and visual formatting intact.
Ensures consistent brand and technical terminology across language pairs using CSV-importable shared glossaries, automated glossary generation, shared style rule lists, and translation memory.
Enhances original drafts and translated copy with real-time sentence rewrites, word alternatives, and one-click tone adjustments (e.g., Business, Academic, Casual, Diplomatic) via browser, desktop, and Microsoft 365/Google Workspace add-ins.
Provides real-time spoken language translation and live multilingual captions for video conferences and mobile in-person dialogues, with 30 minutes per user per month included in paid DeepL Pro plans.

OpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
#1SpecialistAnthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing.
Free / Open-sourceHigh-efficiency open-weight and hosted reasoning AI powered by DeepSeek-V4 and R1 at ultra-low token costs.

SpecialistCross-platform AI writing assistant delivering real-time grammar correction, tone alignment, authorship tracking, and team style guides.
SpecialistParaphrase, proofread and summarize text with an AI writing workspace
AI translation for text, images, documents and speech in 100+ languages
Professional AI translation for text, documents, images and audio

SpecialistOn-premise translation and speech recognition for enterprises

SpecialistAI-powered localization and translation platform for global content

SpecialistExpress yourself with confidence — rewrite, proofread and summarize in one click
SpecialistFree AI translator that cross-checks 22 models for one trusted translation
SpecialistCombines conversational workflow drafting with visual flow builders, focusing on workflow automation rather than frontend copilot embedding.

OpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
SpecialistAnthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing.
Free / Open-sourceHigh-efficiency open-weight and hosted reasoning AI powered by DeepSeek-V4 and R1 at ultra-low token costs.
SpecialistCross-platform AI writing assistant delivering real-time grammar correction, tone alignment, authorship tracking, and team style guides.
SpecialistParaphrase, proofread and summarize text with an AI writing workspace
AI translation for text, images, documents and speech in 100+ languages
SpecialistOn-premise translation and speech recognition for enterprises
SpecialistAI-powered localization and translation platform for global content
SpecialistExpress yourself with confidence — rewrite, proofread and summarize in one click
SpecialistFree AI translator that cross-checks 22 models for one trusted translation
SpecialistCombines conversational workflow drafting with visual flow builders, focusing on workflow automation rather than frontend copilot embedding.