Index Ventures

Abacus.AI enables organizations of all sizes to build and scale the kind of real-time deep learning systems used by Silicon Valley behemoths to build customer engagement and forecast trends. And there’s pedigree in its products. Cofounders include Siddartha Naidu, co-creator of Google’s BigQuery; Bindu Reddy, Amazon Web Services’ former manager of AI vertical services; and former Uber engineer Arvind Sundararajan. Abacus.AI helps some 6,000 clients capture real-time data from sources including social media interactions, online purchases and IoT sensors and use it to train deep learning models for search and personalization, sales and marketing, pricing prediction and supply chain management.

A developer-friendly and enterprise-grade search API.

Automated sales tax compliance for SaaS businesses.

Dollar Shave Club as a platform.

The world's largest omnichannel communications platform.

AI-powered video creation and editing.

Block bots & bad behavior

Open-source column-oriented database management system.

As the largest startup offering cyber insurance and proactive monitoring tools with more than 100,000 policyholders, Coalition insures against incidents like cyberattacks, email scams and accidental privacy violations. It partners with traditional carriers and reinsurers to write insurance, retaining about 10% of the financial risk. In 2025, it continued to expand internationally with its launch in Denmark, France and Sweden. It also acquired Wirespeed, a startup that uses AI to dramatically reduce the time it takes to detect and mitigate a cyber threat. <p>Funding: $800 million from Valor Equity Partners, Allianz X and T. Rowe Price, among others. </p><p>Latest valuation: $5 billion. </p><p>Date of last valuation: July 2022. </p><p>Bona fides: In 2025, it grew active policyholders to 110,000, up from 91,000 the year prior. Not yet profitable but cash-flow positive, says CEO Joshua Motta. </p><p>Cofounders: CEO Joshua Motta, 42, a former CIA analyst and Goldman Sachs investment banker; John Hering, 42, also the founder of Lookout.</p>

The leading online learning platform for technical skills.

All-in-one financial platform for latam Startups and SMBs.

Curtsy is a sustainable clothing resale app.

AI-powered customer support agents.

AI-powered translation service.

A better data science notebook.

Contract and negotiation AI built for lawyers

Backup and share files in the cloud.

The complete toolkit to sell travel.

crowdfunding platform for science