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Sider

Sider

Private
Boston, MassachusettsAI, Data & Cloud Infrastructurehttps://sider.ai/

Momentum

Top 50%

of companies Caplight tracks

Company Overview

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

Keywords

AI sidebarAI copilotbrowser extensionmulti-model AIAI assistantAI writerChatPDFAI aggregatorAI wrapperwebpage summarizerGPT browser extensionAI productivity toolpersonal knowledge basegroup AI chatfreemium SaaS

Historical Pricing

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Caplight Momentum Score

Proprietary index based on bid/ask volume and sentiment.

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Sider Comparables

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Sider comparables — related companies by embedding similarity
CompanySimilarityMarket Cap
MaxAI
94%
Merlin AI
93%
Monica
93%

Sider Funding Rounds

Historical fundraising activity

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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.

Sider Filings

SEC and related filings with document metadata.

Data table
TypedDateAmount OfferedAmount SoldFillingPagesDownload
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Sider Filings

SEC and related filings with document metadata.

Frequently Asked Questions

Common questions about Sider's valuation, stock price, and market status.

Firmographic Details

HeadquartersBoston, Massachusetts
Employee Range10
Year Founded2023
Last Funding

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