Headspace records 1,686,204 monthly visits with +4.3% month-over-month growth and Free Trial, Paid pricing. Sider records 2,644,740 monthly visits with -10.6% growth and Freemium pricing.
Science-backed meditation, sleep and mental health support in one app
AI sidebar and browser agent for reading, writing and research
| Dimension / Metric | ||
|---|---|---|
| Official Domain | headspace.com | sider.ai |
| Pricing Model | Free Trial, Paid | Freemium |
| Monthly Visits | 1.69M (1,686,204) | 2.64M (2,644,740) |
| MoM Traffic Delta | +69.88K (+4.3%) | -314.2K (-10.6%) |
| Primary Market & Share | 🇺🇸 United States (43%) | 🇺🇸 United States (13.3%) |
| Direct Visits / mo | 836.71K | 1.7M |
| User Rating | 4.3 | 4.5 |
| Supported Platforms | Website | Website |
Science-backed meditation, sleep and mental health support in one app
1,000+ expert-led meditations, courses and mindfulness exercises spanning beginner basics, everyday calm, work focus and parenting.
Wind-downs, sleepcasts, soundscapes, sleep music and white noise designed to help you fall asleep faster and stay asleep.
Access to trained mental health coaches and online therapy, with additional psychiatry services available through employer and health plan programs.
An in-app AI companion that learns your preferences and recommends personalized content based on how you feel and what you want to work on.
AI sidebar and browser agent for reading, writing and research
A persistent panel that reads the page you are on and answers follow-ups with GPT, Claude or Gemini without copying content into another tab.
Summarise long articles, PDFs and YouTube videos, extract key points, and ask detailed questions about the source material.
Translate webpages, PDFs and images, compare bilingual output side by side, and have content read aloud for review on the move.
Delegate multi-step tasks across real websites — price comparison, form filling, research and inbox triage — using your existing logged-in sessions.
SpecialistOpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
SpecialistOpenAI'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.
SpecialistAnthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing.
Offers a very similar browser sidebar experience with multiple AI models, but features slightly different pricing and workspace tools.
Offers a very similar browser sidebar experience with multiple AI models, but features slightly different pricing and workspace tools.
SpecialistFocuses on science-backed functional music for sleep and focus rather than traditional guided meditation courses.
SpecialistFocuses on science-backed functional music for sleep and focus rather than traditional guided meditation courses.
Provides robust browser-based summarization and prompt assistance, but lacks some of Sider's deeply integrated multi-model chat UI features.
Provides robust browser-based summarization and prompt assistance, but lacks some of Sider's deeply integrated multi-model chat UI features.
SpecialistFree psychological tests with an AI mental coach who explains your results
SpecialistFree psychological tests with an AI mental coach who explains your results
Excels at advanced web automation and data extraction alongside chat, but has a steeper learning curve than Sider.
Provides conversational AI emotional support and therapist matching, rather than self-guided mindfulness programs.
Provides conversational AI emotional support and therapist matching, rather than self-guided mindfulness programs.
Free / Open-sourceSummarize YouTube, Google, and any page with AI — free in your browser
Free / Open-sourceSummarize YouTube, Google, and any page with AI — free in your browser
Integrates bookmark management and content composition into a clean sidebar, but has a more limited feature set than Sider.
Integrates bookmark management and content composition into a clean sidebar, but has a more limited feature set than Sider.
Delivers streamlined inline writing and webpage summarization via a browser extension, but with fewer custom sidebar tools.
Delivers streamlined inline writing and webpage summarization via a browser extension, but with fewer custom sidebar tools.
SpecialistEmphasizes reflective journaling and emotional pattern tracking over structured mindfulness audio tracks.
SpecialistEmphasizes reflective journaling and emotional pattern tracking over structured mindfulness audio tracks.
