Sider
PrivateCompany Overview
Sider operates in AI, Data & Cloud Infrastructure and is based in Boston, Massachusetts. It was founded in 2023.
Sider is a software company that provides an AI-powered sidebar and multi-platform application that integrates various large language models to assist with reading, writing, and research tasks.
Sector
AI, Data & Cloud Infrastructure
Verticals
NLP & Conversational AI, Content Creation, Workflow Automation, Document Management
Business Model
B2C
Customer Profile
Subscription SaaS, Freemium, Usage-Based SaaS
AI Layer
Application
Historical Pricing
Historical view of private secondary pricing and transaction trends.
Sider Comparables
Compare Sider with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| MaxAI | 94% | |
| Merlin AI | 93% | |
| Monica | 93% |
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Sider Funding Rounds
Historical fundraising activity
Market signals
Structured signals derived from secondary market and firmographic data.
- May 19, 2026
Grew 30% QoQ from 10 to 13 employees.
- Dec 25, 2025
Grew 50% QoQ from 6 to 9 employees.
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Sider Filings
Explore SEC and related filing metadata, where available.
| Type | Date | Amount Offered | Amount Sold | Filing | Pages | Download |
|---|
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Frequently Asked Questions
Common questions about Sider's valuation, stock price, and market status.
Is Sider a public or private company?
Sider is a private company.
What is the current stock price of Sider?
Sider is a private company, so its shares have no public market price. Caplight tracks Sider's secondary market activity and provides MarketPrice™ estimates of its share price to Caplight users.
How much is Sider worth (valuation)?
Valuation information for Sider is not publicly available.
Can I buy Sider stock?
Sider shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors.
When was Sider's last funding round?
Funding round information for Sider is not publicly available.
Who are the main investors in Sider?
Investor information for Sider is not publicly disclosed.
Will Sider IPO soon?
No public IPO plans have been announced for Sider.
How can I track Sider secondary market activity?
Caplight tracks bids, offers, and trades in Sider's shares on secondary markets.