Home
Loading

aVenture is in Alpha: During this preview period, you should expect the research data to be limited and may not yet meet our exacting standards. We've made the decision to provide early access to our data to showcase the product as we build, but you should not yet rely upon it alone for your investment decisions.

aVenture is in Alpha: During this preview period, you should expect the research data to be limited and may not yet meet our exacting standards. We've made the decision to provide early access to our data to showcase the product as we build, but you should not yet rely upon it alone for your investment decisions.

Get in touch

  • Contact

  • Request a demo

  • Request data updates

  • Add a company

Research

  • Companies

  • Investors

  • People

aVenture

  • Sitemap

  • Feature requests

Member

Backed by

© aVenture Investment Company, 2026. All rights reserved.

San Francisco, CA, USA

Privacy Policy

aVenture Investment Company ("aVenture") is an independent research platform providing detailed analysis and data on startups, venture capital investments, and key industry individuals. It is not a registered investment adviser, broker-dealer, or investment advisor and does not provide investment advice or recommendations. The data provided by aVenture does not constitute recommendations or advice, whether by methodology, analysis, AI-generated content, or a statement written by a staff member of aVenture.

aVenture is not affiliated with any of the people, companies, organizations, government agencies, regulatory bodies, or investment funds we provide coverage for on this site unless explicitly stated otherwise. Users assume full responsibility for decisions made based on information obtained from this platform. Links to external websites do not imply endorsement or affiliation with aVenture. Any links that provide the ability to invest in a primary or secondary transaction in a company are for convenience only and do not constitute solicitations or offers to buy or sell an investment. Investors should exercise heightened precaution and due diligence when investing in private companies, especially those not independently audited.

While we strive to provide valuable insights with objectivity and professional diligence, we cannot guarantee the accuracy of the information provided on our platform. Before making any investment decisions, you should verify the accuracy of all pertinent details for your decision. To the fullest extent permitted by law, aVenture shall not be liable for any direct, indirect, incidental, consequential, or financial damages arising from use of this site, whether by consumers of its contents directly or by persons or organizations covered by our research, even if we are advised of the possibility. Our best-efforts processes and correction request forms do not create a warranty or duty of care.

Profiles on this platform may include content generated in part by large language models (LLMs, artificial intelligence) that aggregate publicly available sources (e.g., SEC EDGAR, public filings, press releases). Source attribution is provided where known; always verify statements and claims here against original sources before relying on any data. Content on our site may contain inaccuracies, omissions, or what are commonly called 'hallucinations' if generated in part or in full by AI / LLMs. The risk can also exist even when content is written by a human, as internal and third-party sources may also have inaccuracies for the same or different reasons. While we randomly audit a proportion of content, this is not exhaustive.

We recommend that an independent auditor be hired to verify the accuracy of the information before relying on it for any sensitive decisions. By accessing this platform, you agree not to rely solely on any information generated by AI, aggregated, or sourced or written otherwise on this site, for investment, financial, or other decisions. aVenture assumes no responsibility for inaccuracies, omissions, or hallucinations. You must independently verify all data from primary sources. Use of this platform constitutes your waiver of claims for reliance-based damages, including negligent misrepresentation. To report an error, request a correction, or dispute information about a company or individual, contact us via our request data updates form.

Loading homepage
Loading
Home›Research›Companies

Companies

Loading
Home›
Research›
Companies›
Slack
AddedApr 16, 2026
UpdatedJun 25, 2026
Slack

Slack

Acquired Subsidiary

Slack was a workplace messaging and collaboration company that became part of Salesforce after the acquisition closed in 2021.

HQ
San Francisco, CA, US
Founded
2009
Overview
M & A
Analysis
Compare
Fundraising
Employees
News

Slack was a software company focused on workplace messaging and collaboration. Founded in 2009 and headquartered in San Francisco, it became a widely used communications layer for enterprise teams before Salesforce announced an agreement to acquire the business in December 2020.

Slack reported 2,527 employees at the end of 2020 in its 2021 diversity disclosure. Salesforce completed the acquisition in 2021, after which Slack continued as a product and business unit inside Salesforce.

Slack - M & A Snapshot

Open M & A
  • Salesforce

    Acquired Slack • $27.7B • Jul 21, 2021

  • Rimeto

    Acquired by Slack • Undisclosed • Jul 8, 2020

  • HipChat

    Acquired by Slack • Undisclosed • Jul 26, 2018

  • Screenhero

    Acquired by Slack • Undisclosed • Nov 17, 2014

Slack - Products & Services

  • Team Messaging logo

    Team Messaging

    Slack is a cloud-based team messaging and collaboration platform with AI workflow features for businesses.

    Competing Products

    Alphabet logo
    Rocket.chat logo

Slack - Similar Companies

Rocket.chat logo

Rocket.chat

Mattermost logo

Mattermost

Alphabet logo

Alphabet

abc.xyz

Felix for Slack logo

Felix for Slack

getfelix.app

Startadam logo

Startadam

startadam.com

Fin logo

Fin

fin.ai

Salesforce logo

Salesforce

salesforce.com

Mio logo

Mio

m.io

Viktor logo

Viktor

viktor.com

Pingpad logo

Pingpad

Workast logo

Workast

workast.com

Unthread logo

Unthread

unthread.io

Chatwork logo

Chatwork

chatwork.com

Convo logo

Convo

convo.com

QuicklyChat logo

QuicklyChat

Slack - Quick Facts

Who are Slack's competitors?

Companies similar to Slack include Rocket.chat, Alphabet, Mattermost and Felix for Slack.

When was Slack founded?

Slack was founded in 2009.

Where is Slack's headquarters located?

Slack's headquarters is located in San Francisco, CA, US.

When was Slack's last funding round?

Slack's most recent funding round was for $27.7B (USD) in December 2020.

How much has Slack raised to-date?

As of Dec 1, 2020, Slack has raised a total of $28.5B (USD).

Slack - Classification

Industry
  • Collaboration Software
Ownership
  • Acquired Subsidiary
Technology
  • Messaging
Geographic Exposure
  • Global
Model
  • Platform
Revenue
  • SaaS
  • Subscription
Customer
  • Enterprises
Tags
  • Collaboration