Developer Tools Startups
4,617 companies tagged Developer Tools, with their investors and founders.
Sublayer is an AI-native software studio and lab that builds products, open source projects, and community around AI, including "Where Is Everyone," an attendance-prediction tool for community organizers. Its work explores software creation as the cost of making things approaches zero.
2 investors
SubQ is a sub-quadratic LLM infrastructure company that provides a 12M token context window API for developers and enterprise teams. The platform enables reasoning across full code repositories and long-running agent state through a sparse-attention architecture that reduces attention compute while maintaining reasoning quality.
2 investors
Sun* is a digital creative studio that provides product development, DX (digital transformation), and new-business creation services, including AI-driven modernization and AI agent solutions. It serves enterprise clients across various industries, having supported over 1,000 services and 550+ clients.
2 investors
Superapp is an AI-powered app builder that generates native Swift and SwiftUI apps for iPhone, iPad, Apple Watch, and Mac from plain-English descriptions, without requiring coding. It runs in the browser and builds in the cloud, delivering complete Xcode projects that users own and can export or extend.
2 investors
Superglue provides AI agents that automate enterprise system integration, data migration, and implementation work across cloud or on-premises infrastructure. The platform connects disparate systems and performs data synchronization tasks that typically require manual engineering coordination.
2 investors
Supergood generates real backend APIs for enterprise platforms that lack them by reverse-engineering the underlying network calls behind logins, handling MFA and CAPTCHAs via service accounts. It deploys and maintains these APIs on its own observability platform, offering an MCP server and REST API as an alternative to browser automation.
2 investors
Superlogical is building a multiplexer for software work that unifies interactive, automated, and production workflows in a durable, shareable session; its first product is a modern terminal multiplexer with long-lived sessions accessible via web and native macOS/iOS apps. It targets developers and their tooling and infrastructure workflows.
2 investors
Superset orchestrates 100+ coding agents in parallel across different AI coding tools. It provides agent-agnostic infrastructure for developers to run multiple AI agents simultaneously on code tasks like feature development, bug fixes, and refactoring, with isolated Git worktrees and IDE integration.
2 investors
Swantide provides purpose-built AI agents for Salesforce teams that operate across the project lifecycle, including org health assessment, requirements gathering, impact analysis, solution design, build (Apex, Flows, config), test case generation, debugging, and documentation. It reads only an org's configuration metadata, runs within Salesforce's permission model, and includes a customer success team to drive adoption, with Agentforce readiness assessment among its offerings.
2 investors
Sweetspot is an AI platform for government contractors that identifies federal, state, and local contracting opportunities, manages capture pipelines, and generates proposals. It serves business development and capture teams at government contracting firms seeking to streamline opportunity discovery and bid execution.
2 investors
Syllotips provides a continuous improvement platform for enterprise AI agents that captures expert knowledge and uses human-in-the-loop validation to improve agent accuracy, reduce token waste, and scale expert answers across similar workflows. The platform serves enterprise teams deploying AI agents in customer experience, sales enablement, and field service use cases.
2 investors
Synervoz develops voice AI and audio software solutions for enterprises across multiple industries including gaming, automotive, communications, and finance. The company provides SDKs, staff augmentation, and consulting services alongside custom audio hardware solutions.
2 investors
Synnada is an AI infrastructure company building tools for running persistent, continuously operating agent systems in production, including Mithril (an ML compiler), Tenet (multi-cloud deployment for AI workloads), and Agentia (a runtime for persistent agents). Its Agency product applies these to agent-native data science, combining reasoning, code execution, and machine learning into continuously operating decision systems.
2 investors
Synnax provides software tools for engineering teams to build hardware technology. The platform targets hardware developers and engineers working on physical products.
2 investors
Synthefy develops Nori, an open-weight foundation model for tabular prediction that returns predictions from labeled context without fitting or training a new model. The model is offered as open source under Apache 2.0 and via a managed hosted API, positioned as an alternative to tools like XGBoost.
2 investors
Synthetic runs open-source AI models (any vLLM-supported LLM architecture) for users in private, secure datacenters without training on customer data or storing prompts and completions. It offers subscription and usage-based access through its own app or OpenAI-compatible tools, and provides Synbad, an open-source evaluation suite for coding agents.
2 investors
TAC is a blockchain protocol and Layer that lets Ethereum/EVM developers deploy their DeFi applications and distribute them to Telegram and TON users, enabling "hybrid dApps" that combine EVM logic with TON UX. It provides bridging and infrastructure to connect EVM-based DeFi protocols to Telegram's user base.
2 investors
TakeShape is a data-first platform that connects, transforms, and activates fragmented enterprise data to serve as a runtime for building and orchestrating AI-driven agents. It offers a universal API connector, data pipelines with indexing and vectorization, multi-LLM agent orchestration, and GraphQL/MCP endpoints for enterprises adopting agentic AI.
2 investors
Tako builds a tool that helps knowledge workers find, access, and share information to support data-driven decisions. It operates in the AI-powered information and data software category.
2 investors
TalkJS provides a chat API, SDKs, and pre-built customizable UI components that developers use to add in-app messaging—including 1-on-1, group, and community chat, moderation, and AI bot integration—to web and mobile products. It serves developers and businesses across sectors such as marketplaces, SaaS, customer support, financial services, and healthcare, and is ISO 27001 certified and GDPR compliant.
2 investors
Talsec provides a mobile and web application security SDK offering Runtime Application Self-Protection (RASP), API protection, app hardening, and malware detection for developers building on iOS, Android, and cross-platform frameworks. Its tools defend against reverse engineering, rooting/jailbreaking, hooking, API abuse, bots, and man-in-the-middle attacks, targeting sectors such as banking with regulatory-compliant, banking-grade protection.
2 investors
Tapaya provides a drop-in software development kit that turns any device into an in-store payment terminal, enabling developers to accept multiple payment methods without payments expertise. The platform offers multi-method payment acceptance, analytics, and APIs for developers building payment functionality into their applications.
2 investors
Taste Labs is a hybrid research and infrastructure company that develops tools and models to quantify subjective domains like design and aesthetics, enabling AI systems to produce outputs that are not just technically correct but aesthetically and contextually appropriate.
2 investors
Tellor is a decentralized oracle protocol that produces and distributes on-chain data through a permissionless network of reporters and validators, using its native TRB token for staking, tipping, and governance. It supports custom data requests and maintained "Enshrined Feeds" (such as ETH/USD) for blockchain applications, with a light-client bridge to relay data across networks.
2 investors