CaptionAI — Generate Viral Captions in Seconds
AI-powered caption generator for content creators. Generate viral captions for X/Twitter, LinkedIn, Threads, Instagram, and more. Powered by GPT-4.
Everything You Need to Go Viral
Designed specifically for creators who want maximum engagement with minimum output friction.
GPT-4 Powered Generation
Leverage cutting-edge language models trained on top-performing viral content across social platforms.
Multi-Platform Optimization
Tailor captions specifically for X/Twitter threads, LinkedIn posts, Threads, and Instagram captions.
Custom Tone & Style Control
Adjust tone, formality, length, and brand voice to match your unique content persona.
Viral Score Predictor
Analyze emotional trigger words, readability, and curiosity gaps before publishing.
Emoji & Formatting Engine
Automatically format captions with line breaks, hashtags, and engagement-boosting emojis.
Simple, Transparent Pricing
Choose the perfect plan for your content creation workflow.
Free
10 captions per day. Good for trying CaptionAI.
- 10 captions/day (300 credits/mo)
- Standard formats
- 6 tones
- Community support
- No subscription needed
Core
50 captions + 200 credits. For active creators.
- 50 captions/day + 200 credits/mo (rollover)
- All 6 tones + custom tone
- Image analysis (multimodal)
- API access (extended)
- Earn 10 credits per friend you refer
Pro
500 captions + 500 credits. For growth agencies.
- Unlimited captions + 500 credits/mo
- Everything in Core
- A/B testing captions
- Bulk generation
- Export analytics
- Earn 25 credits per friend you refer
Agency
5+ team seats + MCP Server + 2000 credits. For agencies scaling.
- Everything in Pro
- Team seats (up to 10)
- MCP Server integration
- Dedicated account manager
- Earn 50 credits + 10% revenue share per referral
Loved by Top Creators & Marketers
See how CaptionAI is powering high-engagement content across the web.
"CaptionAI transformed my social growth. My engagement rate tripled in the first 2 weeks!"
"The multi-platform formatting is insanely effective. Saved me hours of writing captions every week."
"Our agency produces content for 15+ clients. CaptionAI is our secret weapon for viral captions."
Frequently Asked Questions
Everything you need to know about CaptionAI.
How does CaptionAI work?
CaptionAI uses advanced GPT-4 models fine-tuned on thousands of high-engagement social media posts to craft compelling captions and social content in seconds.
Which social platforms are supported?
We support X/Twitter, LinkedIn, Threads, Instagram, YouTube Shorts, and TikTok captions with platform-specific formatting rules.
Can I try CaptionAI for free?
Yes! The Free plan gives you 10 caption generations per day forever, with no credit card required.
What happens when I upgrade to Pro or Agency?
Upgrading unlocks unlimited generations, access to GPT-4 engine, team collaboration tools, tone customization, and direct API access.
Can I cancel my subscription anytime?
Absolutely. You can cancel, upgrade, or downgrade your plan at any time directly from your account settings.
Is there an affiliate program?
Yes! Earn extra credits for each user you refer: 10 credits (Core), 25 credits (Pro), and 50 credits + 10% revenue share (Agency). Sign up at https://captionai.theboomer.dev/affiliates.