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Abacus logo

Abacus

YCombinator

Making expense reports obsolete

Abacus is the only real-time expense management solution to reimburse your team, reconcile corporate cards, and automate your expense policy. By eliminating the month-end expense report, Abacus turns submitting and approving expenses into a delightful, collaborative experience. With our mobile app, you'll quickly submit and approve expenses on the go and reimbursements now happen within days. Abacus syncs with your accounting software and auto-matches transactions for hassle-free bookkeeping. Come work with us! We're hiring: abacus.com/about#hiring

B2BNew York City, NYFintechSaaSPaymentsB2B
Abatable logo

Abatable

YCombinator

Carbon markets platform and solutions

Abatable is a carbon offsetting procurement platform which connects companies with carbon project developers of high quality carbon offsets. Abatable facilitates procurement decisions by offering third party quality assessments of projects and by standardizing multi-year purchase agreements and an automated RFP platform. The team has extensive experience advising institutional investors on nature-based carbon removal and impact investment portfolios and is backed by leading investors like YCombinator, BlueBear Capital and Global Founders Capital.

IndustrialsLondon, United KingdomCarbon Capture and RemovalB2BClimate
Abstra logo

Abstra

YCombinator

Automate finance operations with Python and AI

Abstra is a platform that allows finance teams to build, run, and automate their workflows using Python and AI. Instead of relying on spreadsheets, ERPs, and manual processes, teams can create programmable workflows for tasks like reporting, reconciliations, approvals, and integrations with systems like SAP. We provide a developer-friendly environment where finance and technical teams can turn business processes into code, connect to their existing tools, and run everything in a controlled, auditable way. Our goal is to become the operating system for finance operations, where workflows are not static or manual, but versioned, automated, and continuously improved.

B2BSão Paulo, BrazilArtificial IntelligenceSaaSFinanceB2BAutomation
AccessOwl logo

AccessOwl

YCombinator

Managing your Employees' Access to SaaS

AccessOwl automates employee SaaS account provisioning and permissioning for any tool. IT teams from companies like Zeplin and Sary save 30 minutes on every request. Access management used to be an enterprise problem. With work from home, exploding SaaS usage and the need for SOC2 certifications startups have the same problems as enterprises. Mathias and Philip have built several startups and teams before and experienced the same problems around access management over and over again. Philip was the CEO and Co-Founder of blik, an award winning IoT solution that was used by Volkswagen and BMW. Mathias built the leading private payment infrastructure provider in Germany as well as the first digital car insurance as Co-Founder and CTO. Based on these experiences we decided to build a solution we wish we could have used when building our former companies. AccessOwl can be deployed within minutes instead of weeks by simply installing a Slack application. We save companies that use AccessOwl 30 minutes for every access request, on- and offboarding.

B2BBerlin, GermanySaaSB2BComplianceSecurity
Ad Army logo

Ad Army

YCombinator

Generate, iterate, and ship AI ad creatives faster

Ad Army is an AI creative tool for brands that need a constant supply of ad creative. You build your brand's world once — characters, products, locations — each with locked descriptors and reference images. Then you generate against it: @-mention an entity in a prompt and its references are pulled into the model call, so the same product, the same face and the same location hold across images, video, and dozens of variants. Save any chain of steps as a recipe and replay it on the next campaign. We're model-agnostic by design — video, image, text and audio providers sit behind one interface, and new models land as they ship. For a full narrative spot, the same world scripts, storyboards, animates, voices, captions and exports multi-scene ads in every aspect ratio.

B2BLondon, United KingdomGenerative AIB2BMarketingCreator EconomyAI
Adentris logo

Adentris

YCombinator

Real-time AI Compliance & Revenue Integrity for Medical Providers

US healthcare providers lose billions every year to denied claims, most of them traced back to documentation and coding gaps no one catches until the payer says no. Adentris is an AI revenue integrity platform that catches them first. Our AI agents read EHR and payer interfaces directly, no API integration required, across five modules: documentation, coding QA, prior authorization, appeals and denials, and discharge summaries. And for providers that don't have their own CDI or billing teams, we run billing as a service on top of the platform.

HealthcareSan FranciscoArtificial IntelligenceHealth TechB2BComplianceEnterprise Software
Advantage Club logo

Advantage Club

YCombinator

Global platform for employee engagement with rewards&flexible benefits

Advantage Club is a global platform for employee engagement including rewards, flexible benefits, perks and communities. We are currently live with 1000+ companies across 100+ countries and have a ARR of ~$8m. Our revenue has grown ~4x in the last 1 year.

B2BGurugram, IndiaSaaSHuman ResourcesB2BHR Tech
Aer logo

Aer

YCombinator

Compound compliance: the central hub for meeting SEC obligations

Aer Compliance is Rippling for compliance, combining Code of Ethics, marketing, calendars, filings, workflows, and more in a single place.

FintechNew York City, NYFintechB2BRegtech
Aerogen Systems logo

Aerogen Systems

YCombinator

Modernizing Chip Manufacturing Infrastructure

We are building the future of chip manufacturing. Chips are more advanced than ever, and the features inside them keep getting smaller. But the cleanroom infrastructure supporting their manufacture has not scaled at the same pace. Intel, TSMC, Samsung, and others spend billions building and operating massive cleanrooms, only to isolate their most advanced wafers from the surrounding facility as much as possible. We think that architecture is backwards. Instead of making the entire building cleaner, why not make the machinery itself as clean as possible? Talos is our proprietary tool-integrated purification system. It sits directly inside semiconductor equipment and continuously destroys airborne molecular contaminants before they reach the wafer. Instead of fighting contamination by constantly flooding tools with ultra-high-purity nitrogen, Talos keeps the environment inside the machine 10–100x cleaner, without the massive purge-gas bill. Talos is powerful on its own, but it is also the foundation for a much bigger vision: the Cleanpipe. The Aerogen Systems Cleanpipe is an ultra-clean interconnect infrastructure that protects wafers as they move from machine to machine across the fab. Rather than relying on a billion-dollar cleanroom to protect every cubic foot of factory space, Cleanpipe creates a controlled environment only where cleanliness actually matters: around the wafer. Talos cleans the tools. Cleanpipe connects them. Eventually, we delete the cleanroom and build more advanced chips, at greater scale, with radically less infrastructure. With cleanpipes connecting tools, chip fabs can exist anywhere.

IndustrialsAnn Arbor, MIHard TechB2BManufacturingSemiconductors
Affil.ai logo

Affil.ai

YCombinator

AI Affiliate Network For Financial Companies

We build AI compliance for external marketing. For example, we work with major creators to ensure that their content meets credit card marketing guidelines.

B2BSan FranciscoArtificial IntelligenceSaaSB2BComplianceMarketing
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