Developer Tools startup ecosystem
We track 171 organisations in this sector across 6+ countries.
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Tbilisi DevFest 2026
Georgia's largest developer community conference, organized by the Google Developers Group Tbilisi with 1,000+ developers attending talks on Android, web, cloud, AI, and mobile. Features code labs, a women-in-tech track, and a startup showcase. Free admission with registration. One of the best ways to connect with the Georgian and broader Caucasus developer community.
Tenderly
Tenderly is a Belgrade-based blockchain development platform that provides smart contract monitoring, debugging, simulation, and infrastructure tools for Web3 developers. The platform allows teams to test transactions, simulate contract interactions, and set up real-time alerting before deploying to mainnet, significantly reducing the risk and cost of bugs in decentralized applications. Tenderly has raised over $40 million from investors including Spark Capital and Accel, and is used by leading DeFi protocols and blockchain teams globally. It is one of Serbia's highest-profile venture-backed startups and a key piece of developer tooling infrastructure in the Web3 ecosystem.
Theneo
Theneo is a Georgian-founded developer-tools company building AI-assisted API documentation and developer portals, competing directly with Stripe-style 'beautiful docs' experiences and tools like Readme.com, Mintlify, and GitBook's API product. The core insight is that most companies ship OpenAPI or Postman specs but produce documentation that is perpetually out-of-date and unusable by developer customers; Theneo ingests the spec, uses LLMs to generate structured guides, code examples, and quickstarts around it, and then keeps the doc in sync as the API surface changes. Founded by Ana Robakidze, Kate Avetisian, and Tamar Kvezereli, Theneo graduated from Y Combinator's W22 batch and has raised seed capital from tier-one US investors — it is one of the first Georgian startups to reach that kind of Silicon Valley visibility and is a useful flagship for Tbilisi's emerging developer-tools scene.
Thomas Dohmke
German software entrepreneur and former CEO of GitHub (2021-2025), where he oversaw the launch of GitHub Copilot. Born in East Berlin and educated at Technische Universität Berlin, he is co-founder and CEO of Entire, an open-source AI-agent developer platform.
Tomasz Karwatka
Co-founder of Divante and managing partner at Catch the Tornado, Tomasz invests in high-growth software companies shaped by strong product and engineering culture. His strategy centers on composable commerce, open-source infrastructure, and AI-powered products. Notable portfolio examples include Ramp Network, Vue Storefront, and Rigby, with broader exposure to high-value exits in the Polish tech ecosystem.
Tony Edwards
Lead mobile developer at Sapphire Holidays, building cross-platform mobile applications with JavaScript and web technologies. He is an announced speaker at the 2026 ZurichJS Conf in Zurich.
Tracy Lee
CEO of This Dot Labs, a Google Developer Expert and RxJS core team member, and a prominent figure in the JavaScript and open-source web development community. She is an announced speaker at the 2026 ZurichJS Conf in Zurich.
Tremend
Tremend is a software engineering and technology consultancy headquartered in Bucharest, Romania, founded in 2005 by Ioan Cocan and Marius Hanganu. It provides custom software development, digital transformation, product engineering and consultancy across industries including finance, banking, telecom, automotive, healthcare and public services. The company was bootstrapped rather than venture-backed and grew to over 650 engineers before Publicis Groupe acquired it in January 2022 to expand the European delivery capabilities of its Publicis Sapient arm.
TrueLayer
TrueLayer operates an open banking platform across Europe centered on Pay by Bank, enabling consumers to pay directly from their bank accounts rather than using cards. Its product suite includes Payments, Payouts for instant refunds and withdrawals, Bank on File for recurring payments and subscriptions, plus data, verification, and incentive add-ons. The company serves sectors including ecommerce, iGaming, financial services, travel, and crypto. TrueLayer is authorised and regulated by the UK Financial Conduct Authority, and has pursued acquisitions to expand its European footprint and add credit-at-checkout capabilities.
Unbabel
AI-powered Language Operations (LangOps) platform combining machine translation with human editors for multilingual customer support and content. Founded 2013 in Lisbon; acquired by TransPerfect in August 2025.
Unity Technologies
Unity Technologies was founded in Copenhagen in 2004 as a small game studio and evolved into the Unity game engine, a widely used platform for building 2D, 3D, and real time experiences. Unity helped democratize game development with a friendly pricing model, cross platform deployment, and a massive developer ecosystem. The company expanded into industries like automotive, architecture, and simulation, and it went public on the NYSE in 2020. Unity remains one of the most influential Danish founded technology companies in the global developer tools space.
Upvest
API-first investment infrastructure provider (brokerage, settlement, custody) for banks, brokers and fintechs like Revolut and N26. Regulated by BaFin and the FCA. Founded 2017.
Useberry
Remote UX research and unmoderated usability-testing platform for product teams, with card sorting, tree testing, prototype analytics and Figma/Sketch imports. Founded 2018, backed by Metavallon VC.
USENIX Association
Non-profit professional association for advanced computing systems that organises the SREcon conference series for site reliability engineers and production engineers. SREcon26 Europe/Middle East/Africa is held in Dublin, gathering engineers building and operating large-scale systems.
UserGuiding
No-code product adoption platform for building in-app onboarding flows, tooltips, walkthroughs, knowledge bases and surveys to reduce churn. Founded 2017; clients include Uber and UNICEF.
Vibecoder Wednesday #16
An open demo night at Kolektyw3 for people building with AI: participants bring a working app, a half-broken prototype or a weird experiment and show it, with open discussion, an open mic and no slides required. This edition is a special one for Poland Tech Week 2026, and tickets are pay-what-you-want.
Vue.js Amsterdam 2026
Largest Vue.js conference with senior frontend engineers and tool makers. Price: about EUR 350-500. Strong for frontend tooling, UI libraries, and developer productivity startups.
Vue.js Amsterdam 2027
Vue.js Amsterdam marks its 10-year anniversary as its final edition, running 11-12 March 2027 at Theater Amsterdam. The conference gathers roughly 1,000 Vue enthusiasts from over 50 countries and 437 companies, with Vue creator Evan You and Nuxt's Sebastien Chopin among the speakers. It has sold out every year since starting in 2018.
WarsawJS
Warsaw's JavaScript community, running since 2014. It holds monthly meetups combining talks, networking and skill-building for all experience levels, alongside workshops, a talk-proposal track for new speakers, and the WarsawJS Jam. The community also appears as a partner at wider Polish technology and creative-technology events.
Warszawa Java User Group
Warszawa JUG is the Warsaw Java User Group, a community of Java technology enthusiasts with 3,581 members listed on its Meetup group. It runs regular numbered evening meetups hosted by local employers, with talks on the JVM, frameworks and distributed systems.
