How do Grammarly and sync. labs (sync.so) compare in monthly traffic?

Grammarly has 58,867,412 monthly visits, while sync. labs (sync.so) has 250,817. Traffic estimates describe audience size, not product quality.

How do their growth rates compare?

Grammarly has a month-over-month growth rate of -1.5%; sync. labs (sync.so) has +15.7%.

How does pricing compare?

Grammarly: Freemium. Free plan ($0/month) includes core grammar and spelling checks, tone detection, and 100 generative AI prompts/month; Grammarly Pro costs $12/member/month billed annually ($144/year, or $30/month billed monthly) with full-sentence rewrites, plagiarism/AI detection, team style guides, and 2,000 AI prompts/month, while Enterprise offers custom pricing with unlimited AI prompts and BYOK security. sync. labs (sync.so): Usage-based (per frame/second) + monthly plans. Usage-based pricing on top of a subscription. Verified plans from the pricing page: Hobbyist $5/mo (1 min videos, 3 concurrent jobs, 3 voice clones), Creator $19/mo (5 min, 10 concurrent, 5 voice clones, active speaker detection, no watermark), Growth $49/mo (10 min, 20 concurrent, 15 voice clones, 5% usage discount, 3 seats), Scale $249/mo (30 min, 50 concurrent, 50 voice clones, 20% usage discount, 5 seats, batch API). Generation is metered per frame — for example lipsync-2 at $0.002/frame (~$0.05 per second at 25 FPS) up to sync-3 at $0.00533/frame (~$0.133 per second) — while dubbing is about $0.10 per second of audio ($6/min) and text-to-speech about $0.004 per second ($0.24/min) on the entry tiers. Enterprise pricing is by contact for customization, dedicated support and negotiated rates.

What are alternatives to Grammarly and sync. labs (sync.so)?

Other tools in related categories include DeepL, QuillBot Paraphraser, HeyGen, LanguageTool, Synthesia.

Open AI Tools

Grammarly vs sync. labs (sync.so) — Traffic (58.87M vs 250.82K), Pricing & Verdict | Open AI Tools

Head-to-Head Benchmark

Grammarly vs sync. labs (sync.so)

Grammarly records 58,867,412 monthly visits with -1.5% month-over-month growth and Freemium pricing. sync. labs (sync.so) records 250,817 monthly visits with +15.7% growth and Usage-based (per frame/second) + monthly plans pricing.

GrammarlyFreemiumTraffic Leader

Cross-platform AI writing assistant delivering real-time grammar correction, tone alignment, authorship tracking, and team style guides.

Monthly Visits

58.87M

MoM Velocity

-1.5%

Top Market

🇺🇸 United States

View Grammarly Analysis grammarly.com

sync. labs (sync.so)Usage-based (per frame/second) + monthly plans

Studio-grade AI lip sync, visual dubbing and voice cloning for film, ads and creator content

Monthly Visits

250.82K

MoM Velocity

+15.7%

Top Market

🇺🇸 United States

View sync. labs (sync.so) Analysis sync.so

Side-by-Side Traffic & Specification Matrix

Dimension / Metric	Grammarly	sync. labs (sync.so)
Official Domain	grammarly.com	sync.so
Pricing Model	Freemium	Usage-based (per frame/second) + monthly plans
Monthly Visits	58.87M (58,867,412)	250.82K (250,817)

Primary Market & Share	🇺🇸 United States (51.9%)	🇺🇸 United States (39.1%)

Direct Visits / mo	25.4M	152.04K

User Rating	4.4	4.4

Supported Platforms	Website	Website

Grammarly

Cross-platform AI writing assistant delivering real-time grammar correction, tone alignment, authorship tracking, and team style guides.

Ubiquitous Inline Rewriting & Tone Calibration

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.

Specialized AI Agents (AI Grader, Citation Finder & Reader Reactions)

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.

Grammarly Authorship, AI Detector & Plagiarism Checker

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.

Team Style Guides, Brand Tones & Knowledge Share

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.

Strengths & Pros

+Frictionless cross-platform integration works inside virtually every browser, desktop app, email client, and mobile OS without copy-pasting into a separate chatbot.
+Consolidating Premium and Business into Grammarly Pro ($12/member/month annual) gives individuals and small teams access to style guides, analytics, and plagiarism/AI detection in one plan.
+Grammarly Authorship provides a constructive, transparent audit trail for students and writers to demonstrate human writing integrity alongside responsible AI editing.
+Mature enterprise security posture featuring BYOK encryption, Data Loss Prevention, and granular application/domain blocklists.

Limitations

–Month-to-month billing on Grammarly Pro is steep at $30/member/month compared to the $12/member/month annual commitment ($144 billed upfront).
–Core writing intelligence and style rules remain primarily optimized for English dialects (US, UK, Canadian, Australian, Indian) rather than native multilingual grammar checking.
–Aggressive inline underlines and pop-up agent cards can feel visually intrusive in dense technical documents or code-heavy web editors unless muted per domain.

sync. labs (sync.so)

Studio-grade AI lip sync, visual dubbing and voice cloning for film, ads and creator content

Advanced lip sync models

A model lineup spanning sync-3, lipsync-2-pro, lipsync-2 and react-1, handling side faces, occluded mouths, multiple faces per frame, low light and fast camera movement, up to 4K ProRes footage.

Visual dubbing in 29 languages

Keep the original performance and delivery while replacing the dialogue language, so a single shoot can serve global markets without reshooting the actor.

Text-to-speech and voice cloning

Generate the new voice track inside the platform or bring your own TTS API key; plan tiers include a set number of custom cloned voices.

Studio timeline plus AI Assistant

A frame-accurate editor for cut, trim and split work, alongside a guided assistant where you describe the change you want and it configures the generation.

Strengths & Pros

+Handles production-grade edge cases other lip sync tools struggle with: side profiles, occluded faces, multiple faces, low light and fast motion
+Multiple access paths — web Studio, AI Assistant, Premiere Pro and DaVinci Resolve plugins, ComfyUI node and full API — so it fits existing pipelines
+Very wide language coverage for dubbing (29 languages) paired with in-platform voice cloning or bring-your-own TTS