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 Apr 30, 2026, the latest employee count at TrainLoop is 7.

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.

Where does TrainLoop rank among its competitors?

TrainLoop ranks 21st amongst 86 active competitors, of which 22 are funded. It stands 10th in terms of total funding among its competitors. The most recent competitor to raise funding was Portkey, which secured $15M in Feb, 2026.

Who are the top competitors of TrainLoop?

TrainLoop's top competitors include Arthur AI, Portkey and Aporia AI. Among them, Portkey secured the most recent funding round in February, 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 86 active competitors, including 22 funded and 2 that have exited. Its top competitors include companies like Arthur AI, Portkey and Aporia AI.

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

Ranked

21^st among 86 active competitors

Employee Count

7 as on Apr 30, 2026

Similar Companies

Arthur AI & 124 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 1 institutional investor.

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	4688	Seed	8600	5884	9325	6928

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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 7 employees as of Apr 26. Here is TrainLoop's employee count trend over the years:

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Top competitors of TrainLoop include Arthur AI, Portkey and Aporia AI. 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	Arthur AI 2018, New York (United States), Series B	Provider of AI and cloud-based solutions to control and monitor AI models	$63M	Index Ventures, Work-Bench & 7 others	66/100
2nd	Portkey 2023, San Francisco (United States), Series A	Provider of platform offering AI gateway, observability, and governance tools	$18M	Lightspeed India, Elevation Capital & 1 others	61/100
3rd	Aporia AI 2020, Tel Aviv (Israel), Acquired	Provider of a platform for monitoring machine learning models	$30M	TLV Partners, Tiger Global Management & 8 others	57/100
4th	Humanloop 2020, London (United Kingdom), Seed	Provider of solutions to train and deploy NLP models	$2.85M	UCL Technology Fund, Index Ventures & 5 others	57/100
5th	Nuclia 2019, Barcelona (Spain), Acquired	Provider of RAG-as-a-Service platform, AI search, and generative answers	$5.4M	Crane Venture Partners, Ealai & 1 others	53/100
6th	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	50/100
7th	Traceloop 2022, Tel Aviv (Israel), Seed	Platform offering code generation software	$6.6M	Ibex Investors, Sorenson Capital & 4 others	48/100
8th	Athina 2022, San Francisco (United States), Seed	Evaluation and monitoring platform for AI applications	$4.1M	Y Combinator & 9 others	43/100
9th	Featherless 2023, San Francisco (United States), Seed	Serverless provider of large language model inference	$5M	Airbus Ventures, Kickstart Ventures & 5 others	41/100
10th	Ollama 2023, Palo Alto (United States), Funding Raised	Platform offering open-source tools for running large language models locally	-	ACOF	41/100
21st	TrainLoop 2024, San Francisco (United States), Seed	Provider of fine-tune reasoning models	$500K	Y Combinator	31/100