Mantas Mikuckas
About Mantas Mikuckas
Mantas Mikuckas is a co-founder of Vinted, the second-hand clothing marketplace that became Lithuania's first tech unicorn. He served as its chief operating officer and is now described as a former COO and a Vinted board member.
Before and alongside Vinted, Crunchbase lists him as a partner at CEE Capital from 2009 to 2011 and owner of Itex Corporation from 2008 to 2011. He then co-founded the Baltic venture firm Practica Capital, where he was a founder partner from 2011 to January 2016. Practica describes itself as an early-stage fund backing Baltic founders.
Since 2021 he has been a co-founder and board member of Unicorns Lithuania. Change Ventures also names him as Chairman of the Board of Unicorns.LT. He is based in Vilnius, according to Crunchbase and PitchBook.
Crunchbase counts 18 personal investments for Mikuckas. PitchBook counts 22 investments, 13 portfolio companies and 4 exits. The two sources use different methods, so the counts differ.
The Crunchbase list goes back to PIXEVIA (2020), and his earlier activity includes the 2016 PlateCulture round. He has invested alongside Change Ventures, Lifeline Ventures, Blume Equity and Earlybird, among others.
His most recent investment is Guideless, a Vilnius-based startup that uses AI to turn recorded software workflows into training guides. In August 2026 it raised a €1M pre-seed round led by Superhero Capital, with FIRSTPICK VC and angels Thomas Plantenga, Vytautas Atkočaitis and Mikuckas taking part. The company plans to use the money for product development, hiring and expansion into the UK, Europe and the US.
Crunchbase also lists him as an investor in the 2025 seed round of Sintra AI. Public sources do not give the size of his own cheque in either company.
Public profiles describe him as an angel investor who mostly backs seed-stage companies, with a Lithuanian and wider European portfolio. His investments span marketplaces, climate and industrial tech, fintech, consumer apps and AI software, so he is not limited to one sector.
NFX Signal lists an investment range of $5K to $50K with a $25K sweet spot. That is a third-party listing, not a statement from Mikuckas. We found no public statement from him on what he looks for.
- Guideless: AI platform that turns software workflows into training guides; €1M pre-seed, August 2026.
- Sintra AI: AI company; seed round, 2025 (Crunchbase).
- Sort A Brick: pre-seed round, 2025 (Crunchbase).
- Saltz: seed round in April 2024 and a Series A in March 2026, per NFX Signal and Crunchbase.
- Walk15: seed round, 2023 (Crunchbase).
- Aerones: seed round, 2022 (Crunchbase).
- Ovoko: seed round, 2021 (Crunchbase).
- Printify: Series A round, 2021 (Crunchbase).
- PIXEVIA: venture round, 2020 (Crunchbase).
- crunchbase.com/person/mantas-mikuckas
- crunchbase.com/person/mantas-mikuckas/person_overview_investor/timelin
- pitchbook.com/profiles/investor/166376-17
- signal.nfx.com/investors/mantas-mikuckas
- changeventures.com/community
- crunchbase.com/organization/practica-capital
- tech.eu/2026/08/20/lithuanian-ai-startup-guideless-raises-eur1m-to-str
- bebeez.eu/2026/08/24/lithuanian-ai-startup-guideless-raises-e1-million
Investing activity
Mantas Mikuckas appears in 1 AI deal tracked by the Lounge deals desk. The rounds are mostly Pre-seed, with a median round size of $1M. The most recent is Guideless (Pre-seed, €1M, Aug 2026).
Mantas Mikuckas most often invests alongside Superhero Capital, Vytautas Atkočaitis and FIRSTPICK, and the companies they back on Lounge are mostly in AI.
Deals
Frequently asked questions about Mantas Mikuckas
Who is Mantas Mikuckas?
He is a co-founder and former COO of Vinted, a co-founder of Unicorns Lithuania, and a former founder partner at Practica Capital. He now invests as an angel and lives in Lithuania.
Has Mantas Mikuckas invested in AI startups?
Yes. He took part in Guideless's €1M pre-seed round in August 2026. Crunchbase also lists him in the 2025 seed round of Sintra AI.
What check size does Mantas Mikuckas write?
He has not stated one publicly. NFX Signal lists a $5K to $50K range with a $25K sweet spot, but this is a third-party estimate.
What stage does Mantas Mikuckas invest in?
His recorded deals are mostly pre-seed and seed. Some are also listed in later rounds such as Series A, including Saltz, Printify, Aerones and Ovoko.
How can founders contact Mantas Mikuckas?
He has a LinkedIn profile at linkedin.com/in/mantasmikuckas. We found no personal website or X account. A warm introduction through the Vinted or Lithuanian startup community is the more common route.
Is Mantas Mikuckas an angel investor?
Yes. Mantas Mikuckas invests personally as an angel.
What AI companies has Mantas Mikuckas invested in?
Mantas Mikuckas's AI investments include Guideless. The 1 round on Lounge are listed on this page with amounts, dates and co-investors.
What stage does Mantas Mikuckas invest at?
In the rounds tracked on Lounge, Mantas Mikuckas has invested at Pre-seed, with a median round of $1M.
Who does Mantas Mikuckas co-invest with?
Mantas Mikuckas's most frequent co-investors on Lounge are Superhero Capital (1 deal), Vytautas Atkočaitis (1 deal) and FIRSTPICK (1 deal).
How can founders reach Mantas Mikuckas?
Founders on Lounge can see Mantas Mikuckas's contact details in AI Investor Contacts (paid plans), check for a warm introduction through members who worked with them under Warm Paths, and add Mantas Mikuckas to their Investor Pipeline to track the conversation.