When was TrainLoop founded?

TrainLoop was founded in 2024 and raised its 1st funding round 1 year after it was founded.

Where is TrainLoop located?

TrainLoop is headquartered in San Francisco, United States.

Who is the current CEO of TrainLoop?

Jackson Stokes of TrainLoop. They have also founded 1 company.

How many employees does TrainLoop have?

As of Jul 31, 2026, the latest employee count at TrainLoop is 6.

Is TrainLoop a funded company?

TrainLoop is a funded company, having raised a total of $***** in its 1st and only funding round, a Seed round on 2025.

When was the latest funding round of TrainLoop?

TrainLoop's latest funding was a $***** Seed round on 2025, with participation from 1 investor. Its primary sector is AI Infrastructure. In United States, the AI Infrastructure sector has seen $254B in funding in 2026 to date.

Where does TrainLoop rank among its competitors?

TrainLoop ranks 34th amongst 208 active competitors, of which 30 are funded. It stands 11th in terms of total funding among its competitors. The most recent competitor to raise funding was Arthur AI, which secured $2.67M in Jul, 2026.

Who are the top competitors of TrainLoop?

TrainLoop's top competitors include Arize AI, Fiddler Labs and Portkey. Among them, Arthur AI secured the most recent funding round in July, 2026.

TrainLoop - 2026 Company Profile, Team, Funding & Competitors

TrainLoop is a seed company based in San Francisco (United States), founded in 2024 by Mason Pierce and Jackson Stokes. It operates as a Provider of fine-tune reasoning models. TrainLoop has raised $500K in funding. The company has 208 active competitors, including 30 funded and 9 that have exited. Its top competitors include companies like Arize AI, Fiddler Labs and Portkey.

Company Details

Provider of fine-tune reasoning models. It enables users to improve their models' and extensive machine learning expertise. The platform leverages a global network of AI trainers and data labelers to facilitate domain-specific expertise.

Website: www.trainloop.ai/
Email ID: *****@trainloop.ai

Key Metrics

Founded Year

2024

Location

San Francisco, United States

Stage

Seed

Total Funding

$500K in 1 round

Latest Funding Round

Seed, 2025, $*****

Investors

Y Combinator & 1 more

Ranked

34^th among 208 active competitors

Employee Count

6 as on Jul 31, 2026

Similar Companies

Portkey & 154 more

View TrainLoop's full profile

TrainLoop has raised a total funding of $500K over 1 round. Its latest funding round was a Seed round on 2025 for $*****. 1 investor participated in its latest round. TrainLoop has 2 institutional investors.

Here is the list of recent funding rounds of TrainLoop:

Date of Funding	Funding Amount	Round Name	Post-Money Valuation	Revenue Multiple	Lead Investors	Other Investors
2025	4368	Seed	7219	2472	8035	1926

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View details of TrainLoop's funding rounds and investors

The founders of TrainLoop are Mason Pierce and Jackson Stokes. Jackson Stokes is the CEO of TrainLoop.

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

Mason Pierce: Co-Founder & CTO of TrainLoop.
Contact Info: 1 email address
Jackson Stokes: Co-Founder & CEO of TrainLoop.
Contact Info: 1 email address

View details of TrainLoop's Founder profiles and Board Members

TrainLoop's employee count trend

TrainLoop has 6 employees as of Jul 26. Here is TrainLoop's employee count trend over the years:

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Top competitors of TrainLoop include Arize AI, Fiddler Labs and Portkey. Here is the list of Top 10 competitors of TrainLoop, ranked by Tracxn score:

Rank	Company Details	Short Description	Total Funding	Investors	Tracxn Score
1st	Arize AI 2020, San Francisco (United States), Acquired	Provider of AI and SaaS-based ML model observability platform	$131M	Adams Street Partners, Battery Ventures & 13 others	65/100
2nd	Fiddler Labs 2018, Palo Alto (United States), Series C	Developer of AI observability platform for monitoring, explainability, and responsible AI	$100M	Lightspeed Venture Partners, Insight Partners ... & 25 others	65/100
3rd	Portkey 2023, San Francisco (United States), Acquired	Provider of platform offering AI gateway, observability, and governance tools	$18.1M	Elevation Capital, Lightspeed & 4 others	64/100
4th	Comet 2017, New York City (United States), Series B	AI and SaaS-based ML solutions	$63M	OpenView, Scale Venture Partners & 7 others	63/100
5th	Arthur AI 2018, New York (United States), Series B	Provider of AI and cloud-based solutions to control and monitor AI models	$65.7M	Index Ventures, Work-Bench & 7 others	62/100
6th	Traceloop 2022, Tel Aviv (Israel), Acquired	Platform offering code generation software	$6.6M	Ibex Investors, Sorenson Capital & 4 others	55/100
7th	HoneyHive 2022, New York City (United States), Seed	Provider of a platform for AI observability, evaluation, and prompt management	$5.5M	Insight Partners, Zero Prime Ventures & 6 others	54/100
8th	Why Labs 2019, Seattle (United States), Acquired	Provider of an AI analysis platform for ML models	$14M	Defy, Madrona & 5 others	51/100
9th	Galileo 2021, San Francisco (United States), Series B	Provider of AI observability and evaluation platform for AI systems	$68.1M	Battery Ventures, FactoryHQ & 15 others	51/100
10th	TruEra 2019, Redwood City (United States), Acquired	Platform offers tools for monitoring machine learning models	$42.3M	B Capital, Wing Venture Capital & 8 others	50/100
34th	TrainLoop 2024, San Francisco (United States), Seed	Provider of fine-tune reasoning models	$500K	Y Combinator, Moonfire	31/100