Sider records 2,644,740 monthly visits with -10.6% month-over-month growth and Freemium pricing. Spark Mail records 435,229 monthly visits with -13.5% growth and Freemium, Free Trial pricing.
AI sidebar and browser agent for reading, writing and research
Smart, focused email with AI help — for individuals and teams
| Dimension / Metric | | |
|---|---|---|
| Official Domain | sider.ai | sparkmailapp.com |
| Pricing Model | Freemium | Freemium, Free Trial |
| Monthly Visits | 2.64M (2,644,740) | 435.23K (435,229) |
| MoM Traffic Delta | -314.2K (-10.6%) | -67.76K (-13.5%) |
| Primary Market & Share | 🇺🇸 United States (13.3%) | 🇺🇸 United States (31.3%) |
| Direct Visits / mo | 1.7M | 198.43K |
| User Rating | 4.5 | 4.3 |
| Supported Platforms | Website | Website |
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.
Smart, focused email with AI help — for individuals and teams
Spark's Smart Inbox and Priority highlight messages from important people and bundle newsletters and notifications so the rest of your inbox stays quiet.
An AI Assistant lets you find, summarize, and take action on anything in your inbox, while an AI writing assistant drafts emails and Auto-Drafts pre-writes replies.
Translate incoming messages, get instant summaries of long threads, and quickly grasp the point without reading every line.
Share drafts, leave private comments, delegate ownership, and track progress on email threads with your colleagues.
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.
Blazing-fast keyboard-driven email experience with powerful AI features, but operates on a much higher subscription price point.
Blazing-fast keyboard-driven email experience with powerful AI features, but operates on a much higher subscription price point.
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.
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.
Significantly stronger team collaboration features with shared inboxes and internal chat, but less focus on standalone consumer AI drafting.
Significantly stronger team collaboration features with shared inboxes and internal chat, but less focus on standalone consumer AI drafting.
Excels at advanced web automation and data extraction alongside chat, but has a steeper learning curve than Sider.
Provides cross-platform support with integrated AI drafting, but lacks some of Spark's advanced shared team workspace features.
Provides cross-platform support with integrated AI drafting, but lacks some of Spark's advanced shared team workspace features.
Offers deeper AI-driven inbox organization and automated bundles, but has a different interface and navigation structure than Spark.
Offers deeper AI-driven inbox organization and automated bundles, but has a different interface and navigation structure than Spark.
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.
SpecialistOne AI assistant that works wherever you work
SpecialistOne AI assistant that works wherever you work
