Grammarly records 58,867,412 monthly visits with -1.5% month-over-month growth and Freemium pricing. Soniox records 335,647 monthly visits with +2.2% growth and Paid pricing.
Cross-platform AI writing assistant delivering real-time grammar correction, tone alignment, authorship tracking, and team style guides.
One speech AI API for recognition, generation, and translation in 60+ languages
| Dimension / Metric | | |
|---|---|---|
| Official Domain | grammarly.com | soniox.com |
| Pricing Model | Freemium | Paid |
| Monthly Visits | 58.87M (58,867,412) | 335.65K (335,647) |
| MoM Traffic Delta | -916.08K (-1.5%) | +7.29K (+2.2%) |
| Primary Market & Share | 🇺🇸 United States (51.9%) | 🇺🇸 United States (12.5%) |
| Direct Visits / mo | 25.4M | 181.75K |
| User Rating | 4.4 | 4.5 |
| Supported Platforms | Website | Website |
Cross-platform AI writing assistant delivering real-time grammar correction, tone alignment, authorship tracking, and team style guides.
Works natively inside Chrome, Safari, Firefox, Edge, Windows, Mac, Google Docs, MS Office, and mobile keyboards to flag grammar mistakes, rewrite tangled sentences, and shift tone toward confident, empathetic, or executive registers.
Deploys contextual AI agents that predict how a target audience will react to a draft, locate credible supporting citations, grade essays against rubric criteria, and generate drafts using up to 2,000 monthly prompts on Pro.
Scans text against billions of web pages and academic databases for accidental plagiarism, detects AI-generated passages, and logs transparent document provenance via Authorship reports in Google Docs and Word.
Enables teams on Pro and Enterprise plans to codify company terminology, ban deprecated jargon, enforce inclusive language, insert shared Snippets, and surface internal company definitions inline.
One speech AI API for recognition, generation, and translation in 60+ languages
Soniox STT delivers high accuracy across 60+ languages, accents, numbers, names, and domain vocabulary, engineered for fast multi-speaker conversations and noisy environments.
Generate expressive speech in 60+ languages with audio tags, alphanumeric accuracy, seamless language switching, 200+ built-in voices, and instant voice cloning.
Translate speech in real time across roughly 3,600 language pairs, with low-latency output that starts before a sentence finishes and handles mid-sentence language switching.
Streaming models transcribe speech and start generating audio from the first few words, keeping interaction fast enough for live voice agents and captions.
SpecialistOutstanding for context-aware translation and professional writing refinement, but not designed as a dedicated grammar checker.
SpecialistOutstanding for context-aware translation and professional writing refinement, but not designed as a dedicated grammar checker.
Industry leader for high-fidelity speech synthesis and voice cloning, though less focused on raw streaming STT infrastructure.
Industry leader for high-fidelity speech synthesis and voice cloning, though less focused on raw streaming STT infrastructure.
Excels at heavy paraphrasing and text rewriting, but offers less seamless inline real-time proofreading across all apps.
Excels at heavy paraphrasing and text rewriting, but offers less seamless inline real-time proofreading across all apps.
Free / Open-sourceOpen-source voice platform offering studio-grade text-to-speech and instant cloning, suitable for self-hosting deployments.
Free / Open-sourceOpen-source voice platform offering studio-grade text-to-speech and instant cloning, suitable for self-hosting deployments.
Provides strong multilingual grammar and style checking across apps, but offers fewer advanced generative AI features.
Provides strong multilingual grammar and style checking across apps, but offers fewer advanced generative AI features.
SpecialistProvides expressive multilingual text-to-speech and voice cloning APIs with strong performance across global languages.
SpecialistProvides expressive multilingual text-to-speech and voice cloning APIs with strong performance across global languages.
Delivers extremely low-latency real-time text-to-speech and streaming transcription APIs tailored for conversational agents.
Delivers extremely low-latency real-time text-to-speech and streaming transcription APIs tailored for conversational agents.
Delivers deeper manuscript analysis and structural reports, but has a steeper learning curve than Grammarly.
Delivers deeper manuscript analysis and structural reports, but has a steeper learning curve than Grammarly.
SpecialistAI academic writing assistant that edits, cites, and checks your manuscript right where you write
SpecialistAI academic writing assistant that edits, cites, and checks your manuscript right where you write
Provides ultra-fast real-time speech-to-text and voice AI APIs, but with less emphasis on integrated translation.
Provides ultra-fast real-time speech-to-text and voice AI APIs, but with less emphasis on integrated translation.
SpecialistSpecialises in orchestrating conversational voice agents and telephony integrations rather than standalone speech APIs.
SpecialistHighlights readability and sentence complexity visually, but lacks automated grammar correction and browser-wide extension support.
SpecialistHighlights readability and sentence complexity visually, but lacks automated grammar correction and browser-wide extension support.
