Developer Tools Startups

Terse builds Durable Actors, an open source alternative to Cloudflare Durable Objects with higher memory limits, direct SQLite storage access, and default concurrency safety. It targets developers building background-agent and multiplayer infrastructure.

1 investor

Tesser offers a cloud development runtime and CLI that offload workloads such as servers, builds, tests, and typechecking to isolated cloud machines, letting developers run multiple environments in parallel while using their existing editors and coding agents. It handles provisioning, networking, and port forwarding, and lets teams share environments and live previews, running on Tesser's infrastructure or the team's own cloud, serving software development teams.

1 investor

Testbirds provides crowdtesting services that use a global community of real testers on real devices to run QA and UX tests on companies' digital products, from usability checks to full test management. It serves businesses across industries, including e-commerce merchants, and offers services such as exploratory bug testing and payment testing.

1 investor

Testery is a cloud platform that runs automated test suites in parallel, gates deployments, and provides an audit trail verifying that AI-generated code passes tests. It supports existing frameworks like Playwright, Cypress, Selenium, and Robot Framework, integrates with CI pipelines, and can be driven from Claude Code or MCP-compatible AI assistants for software development teams.

1 investor

TestFairy, an Israeli company, provides a mobile application testing and distribution platform for development teams. It hosts pre-release builds under a company's own branding, lets testers download apps, and captures bug reports and session data that feed into existing tracking tools. Development teams use it to gather feedback across successive releases.

1 investor

TestifySec turns software pipelines into continuous compliance evidence streams by automatically capturing and signing artifacts, builds, and security scans. It maps evidence to compliance frameworks like SOC 2, FedRAMP, and NIST 800-53, generating audit-ready reports and System Security Plans without manual work.

1 investor

Testkube is an open, Kubernetes-native testing platform that lets engineering teams create, orchestrate, run, and analyze tests across any testing tool (Cypress, Playwright, k6, JMeter, pytest, and others), CI/CD pipeline, and environment from a single place. It combines a central Control Plane with self-hosted Agents that run inside a customer's own cloud or on-prem infrastructure, and includes AI features for test authoring, failure analysis, and auto-remediation.

1 investor

TestParty automatically scans source code and media to detect and remediate digital accessibility violations, integrating with IDEs, CI/CD pipelines, and content management systems to help businesses meet WCAG and global accessibility regulations. It serves website and eCommerce operators needing accessibility compliance, combining automated remediation with certified manual auditing.

1 investor

TestResults is a test automation platform that uses screen recognition and plain-language prompts to generate risk-based test cases and automate testing across SAP, web, mobile, mainframe, and medical device applications. It targets regulated, high-compliance organizations such as financial institutions, offering on-premise, private, or European cloud deployment.

1 investor

Teta was a product-building service that has been discontinued and is no longer accepting sign-ups or projects. Its founder has since started Anomalia, focused on automating business marketing.

1 investor

Text'nPayMe is a B2B fintech company offering embedded payment solutions, including a payment keyboard SDK and payment gateway hub, for banks, fintechs, telecoms, and online retailers. The company was founded in Armenia and is incorporated in the USA.

1 investor

The App Company is led by entrepreneurs with extensive experience in marketing services and digital ventures, though the page does not clearly state what the company itself currently does or builds.

1 investor

Cloudscaling was a cloud infrastructure company known for its work on OpenStack-based private and hybrid cloud systems, and it was acquired by EMC in 2014. The domain now primarily hosts a blog by founder Randy Bias covering cloud computing, OpenStack, and DevOps topics.

1 investor

Collabo is a digital marketing agency that helps businesses grow online using search engine optimization, social media marketing, pay-per-click advertising, and web analytics. The company also provides web design, content management systems, and web hosting services for clients seeking to increase website traffic and lead conversion.

1 investor

The Company Company develops software agents and infrastructure for operating businesses, serving companies that want to automate their operations.

1 investor

The Context Company provides observability and monitoring software for AI agents, helping developers identify and fix user frustration, tool failures, and behavioral issues in agent systems. The platform integrates with popular AI frameworks and surfaces alerts on hallucinations, missed goals, and performance problems.

1 investor

The Letter Company builds engineering tools and models, including a coding agent, harness, and IDE, designed specifically for growth engineering.

1 investor

A platform that optimizes product visibility in AI-generated answers and enables products to be discovered by AI agents when answering questions or completing tasks. It helps companies measure traffic and mentions from AI bots.

1 investor

SEMQ is a semantic state layer for AI systems that encodes embeddings as deterministic angular codes, letting teams save, replay, transfer, diff, and audit the state of production AI agents across any hardware or provider. It sits beneath existing embedding pipelines and is compatible with vector stores such as Pinecone, Weaviate, pgvector, and Qdrant.

1 investor

The TestMart provides AI-powered testing automation for Microsoft Dynamics 365 enterprises, reducing test cycles from weeks to days while maintaining deterministic validation and auditability. The platform uses AI for test authoring and recommends approaches, but relies on deterministic execution to ensure predictable, auditable software releases.

1 investor

The Weather is a creative agency that designs and builds digital experiences for startups and enterprises globally. The fully remote, multidisciplinary team specializes in web design, development, and related digital services.

1 investor

The Whisper Company develops security software delivered as SDKs, including a Human-Centric authentication tool (FYEO) built on Zero Trust principles and a Quantum-Ready Encryption (QRE) SDK designed to protect data against future quantum decryption. Its products target enterprises and developers seeking to secure logins, remote access, and encrypted communications.

1 investor

Theanna provides tools, education, and community support for women entrepreneurs to build companies from idea to market traction. The platform helps women founders access networks, business knowledge, and resources traditionally gatekept behind male-dominated networks.

1 investor

ThemeFusion develops Avada, a WordPress website builder with prebuilt website templates, design elements, and WooCommerce integration for building responsive sites and online stores. It targets website owners and businesses building professional sites without custom development.

1 investor