When was Ostium founded?

Ostium was founded in 2022 and raised its 1st funding round 1 year after it was founded.

Where is Ostium located?

Ostium is headquartered in Chicago, United States.

Who is the current CEO of Ostium?

Kaledora Fontana Kiernan-Linn of Ostium. They have also founded 1 company.

How many employees does Ostium have?

As of Oct 31, 2026, the latest employee count at Ostium is 27.

Is Ostium a funded company?

Ostium is a funded company, having raised a total of $28M across 2 funding rounds to date. The company's 1st funding round was a $***** Seed round, raised on 2023.

When was the latest funding round of Ostium?

Ostium's latest funding was a $***** Series A round on Dec 03, 2025, with participation from 5 investors. Its primary sector is Cryptocurrencies. In United States, the Cryptocurrencies sector has seen $2.37B in funding in 2026 to date.

Where does Ostium rank among its competitors?

Ostium ranks 5th amongst 100 active competitors, of which 37 are funded. It stands 5th in terms of total funding among its competitors. The most recent competitor to raise funding was Synthetix, which secured $150M in Apr, 2026.

Who are the top competitors of Ostium?

Ostium's top competitors include Blofin, dYdX and Synthetix. Among them, Synthetix secured the most recent funding round in April, 2026.

Ostium - 2026 Company Profile, Team, Funding & Competitors

Ostium is a series A company based in Chicago (United States), founded in 2022 by Kaledora Fontana Kiernan-Linn and Marco Antonio Ribeiro. It operates as a Platform providing on-chain perpetual swaps for stocks, indices, commodities, and FX. Ostium has raised $28M in funding from General Catalyst and Jump Crypto. The company has 100 active competitors, including 37 funded and 1 that has exited. Its top competitors include companies like Blofin, dYdX and Synthetix.

Company Details

Platform providing on-chain perpetual swaps for stocks, indices, commodities, and FX. It facilitates trading traditional and crypto assets with transparency. The platform offers leveraged trading directly from a user's wallet. It provides access to markets without brokers, hidden spreads, or frozen funds. The platform uses open, auditable code for tracking trades and transactions.

Website: www.ostium.com/
Social
Email ID: *****@ostium.io

Key Metrics

Founded Year

2022

Location

Chicago, United States

Stage

Series A

Total Funding

$28M in 2 rounds

Latest Funding Round

Series A, Dec 03, 2025, $*****

Investors

General Catalyst & 10 more

Ranked

5^th among 100 active competitors

Employee Count

27 as on Oct 31, 2026

Similar Companies

Blofin & 104 more

View Ostium's full profile

Ostium has raised a total funding of $28M over 2 rounds. Its first funding round was on 2023. Its latest funding round was a Series A round on Dec 03, 2025 for $*****. 5 investors participated in its latest round. Ostium has 8 institutional investors and 3 angel investors.

Here is the list of recent funding rounds of Ostium:

Date of Funding	Funding Amount	Round Name	Post-Money Valuation	Revenue Multiple	Lead Investors	Other Investors
Dec 03, 2025	7690903	Series A	9689502	5936673	4277775	9112510
2023	5212	Seed	3736	1581	8733	9736

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View details of Ostium's funding rounds and investors

The founders of Ostium are Kaledora Fontana Kiernan-Linn and Marco Antonio Ribeiro. Kaledora Fontana Kiernan-Linn is the CEO of Ostium.

Here are the details of Ostium's key team members:

Kaledora Fontana Kiernan-Linn: Co-Founder & CEO of Ostium.
Marco Antonio Ribeiro: Co-Founder & CTO of Ostium.

View details of Ostium's Founder profiles and Board Members

Ostium's employee count trend

Ostium has 27 employees as of Oct 26. Here is Ostium's employee count trend over the years:

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Top competitors of Ostium include Blofin, dYdX and Synthetix. Here is the list of Top 10 competitors of Ostium, ranked by Tracxn score:

Rank	Company Details	Short Description	Total Funding	Investors	Tracxn Score
1st	Blofin 2019, George Town (Cayman Islands), Series B	Cryptocurrency futures trading platform	$50M	KuCoin, SIG & 1 others	61/100
2nd	dYdX 2017, New York City (United States), Series C	Developer of a decentralised platform for perpetual contract trading	$87M	Andreessen Horowitz, Paradigm & 45 others	57/100
3rd	Synthetix 2017, Sydney (Australia), Series C	Operator of a platform for perpetual futures trading on Ethereum	$240M	Framework Ventures, Goldman Sachs Asset Management ... & 21 others	56/100
4th	Flipster 2021, Panama (Panama), Unfunded	Provider of a cryptocurrency derivatives trading exchange	-	-	56/100
5th	Ostium 2022, Chicago (United States), Series A	Platform providing on-chain perpetual swaps for stocks, indices, commodities, and FX	$28M	SIG, Wintermute & 9 others	54/100
6th	Drift 2021, United States, Series B	Future & options focused trading solutions for cryptocurrency	$28.8M	Multicoin Capital, Tether & 13 others	53/100
7th	EdgeX 2023, Singapore (Singapore), Seed	Developer of decentralized exchange platform providing perpetual and spot trading	-	Amber Group, Circle	50/100
8th	MYX Finance 2023, Singapore (Singapore), Seed	Online platform for perpetual trading	$5M	Consensys, HSG & 12 others	49/100
9th	LogX 2021, George Town (Cayman Islands), Seed	Provider of a decentralized derivatives trading platform and DeFi superapp for on-chain perpetuals trading	$10.1M	Saison Capital, Hashed Emergent & 19 others	48/100
10th	Ethgas 2024, British Virgin Islands, Seed	Operator of a marketplace for Ethereum blockspace commitments and trading	$17M	Polychain, SIG DT Investments & 6 others	46/100