Sider

Sider is an AI assistant delivered primarily as a browser extension and sidebar that lets users interact with multiple large language models without leaving the page they are on. It aggregates access to models from several vendors — including GPT (4o, 4o-mini, 4.5, o1, o3-mini), Claude (including 3.7 Sonnet and Claude 4 Opus), Gemini and DeepSeek — and lets users switch between them for different tasks, alongside a "Group AI Chat" mode that consolidates answers from several models.

Beyond chat, the product bundles reading and writing assistance on any web page, automatic detection and summarization of the open tab, PDF and document summarization, chat over links and images, translation, OCR, a grammar checker, an AI image tool, and YouTube features including video summaries with key highlights and an AI video shortener. A Deep Research agent scans large numbers of sources (the company describes 100+ relevant sources), reflects on findings, highlights key information, takes notes, and produces a written research document with a source list plus an interactive report exportable as HTML. Research materials and notes are stored in Wisebase, an accumulating personal knowledge base.

Distribution began with Chrome and Edge extensions and has broadened to Safari, plus applications for macOS, Windows, iOS and Android.

Business model

Sider is a consumer and prosumer software subscription business. A free tier provides basic access, while paid tiers are metered by a credit system that separates "basic" credits (standard models and routine tasks) from "advanced" credits (premium models and heavier features). Because the product resells access to third-party frontier models, unit economics are tied to model inference costs, which the company manages through credit allocations, per-model credit weights and, for the most expensive models, per-day usage caps.

Subscription tiers billed monthly with discounts for annual prepayment: Starter at $5/month (1,800 basic and 100 advanced credits, 17% off annually), Basic at $10/month (3,600 basic and 200 advanced credits, 33% off annually), Pro at $20/month (12,000 basic and 400 advanced credits, 38% off annually) and Unlimited at $30/month (unlimited basic and advanced credits, 44% off annually). A free tier is also available.

Traction

Third-party listings report more than 4 million active users and over 32,000 five-star ratings. On Product Hunt the product has 25 reviews averaging 4.4/5, roughly 3,900 followers, and three launches since 2023; reviews date from 2023 onward and include responses from company staff. One reviewer reported five months of stable daily use in 2025 without notable downtime.

Latest developments

The most recent product emphasis is the Deep Research agent and the Wisebase knowledge base, with the company describing itself as a "Deep Research Agent & AI Research Browser Extension." Reviewers note frequent updates that track new model releases, and access controls introduced for expensive models — for example, a stated limit of one Claude 4 Opus use per user per day attributed to limited concurrency, high operating costs and a surge in demand.