Weld
Copenhagen, DK · 94 employees on LinkedIn · 7 known investors
Weld provides ETL (extract, transform, load) pipelines that move data from multiple SaaS tools into centralized destinations for analytics, AI, and operational workflows. The platform is built for data-driven teams across enterprise and mid-market segments globally.
Also known as Weld.app
Founders & leadership
Investors · 7
Also in the syndicate · 4
Company profile
researched Aug 2026Weld is a Copenhagen-founded data movement platform that replicates data from SaaS applications, databases and advertising platforms into cloud data warehouses, and syncs modelled data back out to business tools. The extract layer supports incremental, full and log-based change data capture (CDC) replication from more than 300 sources, with CDC available for PostgreSQL, MySQL, SQL Server and MongoDB. Supported destinations include Google BigQuery, Snowflake, Databricks, PostgreSQL, Amazon Redshift and, as of a July 2026 update, ClickHouse.
Beyond ingestion, Weld offers transformation orchestration — customers can use dbt Cloud or dbt Core, push models via GitHub, or work in Weld's built-in SQL workspace, with a REST Transforms API for creating, updating and versioning models. A reverse ETL capability activates warehouse models into systems such as Salesforce, HubSpot, Intercom and Google Ads using row-level diffing and idempotent upserts. The Weld Connect API allows programmatic and white-label embedding of ELT pipelines into other products, including feeding structured data into vector databases and LLM workflows, and an MCP server lets AI agents query the warehouse and run or debug pipelines conversationally. Operational features include automatic schema migration detection, API version handling, duplicate detection and validation checks, monitoring, alerting and self-healing retries with exponential back-off.
The company states enterprise-oriented security and compliance posture covering SOC 2 Type I, II and III, ISO 27001 certification, HIPAA-ready controls, GDPR compliance with EU data residency options, TLS 1.2+ in transit, encryption at rest, and SSO/MFA with role-based access control.
Founding story
The company's about page states that co-founders Jonas Thordal and Kristian Barrett were early employees at Pleo, where they built the company's data infrastructure from the ground up; that experience shaped Weld's stated mission of delivering simple, fast, reliable and secure ETL pipelines.
Business model
Weld sells a self-serve and subscription software platform, offering a 14-day free trial with no credit card required and a free entry point. It also provides an embeddable/white-label option, Weld Connect, through which other software vendors can offer data ingestion to their own customers via a single API key.
Subscription software with a free entry tier and paid plans following a 14-day trial; API-based Connect access is gated by an API key.
Traction
The company reports supporting hundreds of data-driven teams in more than 20 countries, 150,000+ daily syncs/data jobs, 99.9% uptime across syncs, over 2.5 trillion records synced annually and more than 30 terabytes moved per day, plus a 4.8/5 G2 rating from 100+ reviews.
Latest developments
Blog posts on the company site describe a July 2026 product update adding Gmail, Toast Analytics, HTTP File and Webhooks connectors, ClickHouse as a destination, and reverse ETL management through the Weld Connect API and MCP Server; a Zoho CRM connector with 12 streams went live in August 2026, alongside SQL modelling content for Amazon Seller and Vendor Central reporting.
▸Full profile — market position, technology, go-to-market, geography, history
Market position
Weld positions itself as a managed alternative to self-built data pipelines for teams standardising on cloud warehouses, emphasising reliability, breadth of connectors (300+ sources) and compliance certifications, and more recently AI-agent access to warehouse data via an MCP server.
Weld combines ingestion, in-platform or bring-your-own dbt transformation, and reverse ETL activation in one product, adds an MCP server for conversational agent access to pipelines and warehouse queries, and exposes an embeddable white-label Connect API; it also markets EU data residency and a broad compliance set including SOC 2, ISO 27001 and HIPAA readiness.
Technology
Cloud ELT infrastructure with schema-aware, type-safe replication, log-based CDC, automatic schema migration and API versioning, exponential back-off retries, duplicate detection and validation, plus REST APIs for syncs and transforms and an MCP server interface for AI agents. Transformation supports dbt Cloud webhooks, dbt Core with external orchestrators (Airflow, Dagster, Prefect), GitHub-based deployment and development in Claude Code, Cursor or VS Code with GitHub Copilot.
Go-to-market
Product-led self-serve acquisition via a free tier and 14-day trial, supported by content marketing (a blog covering connectors, SQL modelling templates and monthly product updates) and public review-site presence, with a 4.8/5 rating from over 100 G2 reviews. An API-first Connect offering targets embedded and programmatic distribution.
Data teams and engineering organisations at companies using multiple SaaS tools and cloud data warehouses; the platform is also aimed at software vendors embedding ingestion into their own products and at teams building AI/RAG pipelines.
Geography
Headquartered in Copenhagen, Denmark. In 2021 roughly 40% of employees worked remotely across Denmark, Germany, England and Canada, with New York and London named as target locations for 2022 expansion. The company reports active customers in more than 20 countries and offers EU data residency options.
History
Weld was founded in Copenhagen in 2021. Contemporary press coverage from 2021 named the founders as Jonas Thordal, Jakob Skytte and Jakob Kristensen, while the company's own about page names Jonas Thordal (CEO) and Kristian Barrett (CTO) as co-founders. In its first year the company raised a €4 million seed round and set out plans to open offices in the UK and US in the first half of 2022, growing headcount from 30 toward 75. By the time of its current about page, Weld reported multiple funding rounds, customers in more than 20 countries and infrastructure running over 150,000 daily data jobs.
Compiled by commissioned research from 8 cited public sources — announcements, filings, and press listed under research sources below.
Key figures
latest reportedCompany-reported or press-reported figures, each dated to when it was claimed — not independently audited.
Competitors · 8
by search overlap
Companies competing with Weld for the same Google search keywords, organic and paid, via search-intersection analysis.
Timeline · 4
launches, deals, and filingsWeld launched a Zoho CRM connector covering 12 streams, published alongside SQL models for the data.
Weld added Gmail, Toast Analytics, HTTP File and Webhooks connectors, ClickHouse as a destination, and reverse ETL management via the Weld Connect API and MCP Server.
Weld raised €4 million (reported as $4.8M) led by Frontline Ventures and Cherry Ventures, with angel investors Des Traynor (Intercom co-founder), David Clarke (former Workday CTO), Phil Chambers (Peakon co-founder) and Petr Janda (Pleo CTO). Funds earmarked for product development and international expansion.
$4.8M source ↗
Weld said it intended to open offices in the UK and US in the first half of 2022, targeting New York and London, and to grow headcount from 30 to 75 by the end of 2022.
Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.
In the news
What November's school question means for Weld Re-8 voters | News | ftluptonpress.comftluptonpress.com · Jul 2026
Weld County to bring back program to support small businesses with as much as $50,000greeleytribune.com · Jul 2026▸Research sources · 8
primary sources listed
- Weldweld.app · web
8 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does Weld do?
- Copenhagen-based Weld runs managed ETL, reverse ETL and transformation pipelines feeding warehouses, analytics and AI agents.
- Who founded Weld?
- Weld was founded by Jonas Thordal, Kristian Barrett.
- Who are Weld's investors?
- Weld's investors include Cherry Ventures, Frontline Ventures, Emblem.
- Where is Weld headquartered?
- Weld is headquartered in Copenhagen, DK.