4.8/5 on G2 · (100+ reviews)

Fast, reliable data
for agents

Deliver fresh, reliable data to your AI agents, analytics, and operational tools with fully autonomous ETL pipelines.

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Loved by data teams from around the world

MCP Server

Connect your AI agents

Query your warehouse and run your pipelines conversationally, from any AI agent.

You

Learn more about the Weld MCP Server

EXTRACT

Bring all your data together

Replicate data from all your sources to your warehouse in minutes.

+312more

Replicate data to your warehouse in minutes

Incremental, full, and CDC replication from 300+ sources into your warehouse. Schema-aware, type-safe, and reliable by default.

Built for modern data technology

Google BigQuery

Snowflake

Databricks

PostgreSQL

Amazon Redshift

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Change Data Capture (CDC)

Log-based CDC for PostgreSQL, MySQL, SQL Server and MongoDB. Capture inserts, updates and deletes in near real-time.

Learn more about CDC

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HubSpot

Data source

Authenticating…

Ready to connect

cron 0 */6 * * *us-east-1

Zero maintenance data pipelines

Automatic schema migrations, CDC conflict resolution, and API versioning. Self-healing with exponential back-off retries.

Automatic schema & API handling

Weld detects schema changes, manages API versioning, and prevents breaking updates automatically.

Built-in data quality & reliability

Duplicate detection, validation checks, and proactive alerts keep your pipelines clean and dependable.

End-to-end visibility & self-healing

Real-time monitoring plus automatic retries ensure pipelines recover fast and stay running.

Learn more about data pipelines

pipeline_monitor

live

hubspot_contacts

Healthy

stripe_payments

Schema change detected

salesforce_leads

Healthy

zendesk_tickets

Healthy

[auto] Schema change detected on stripe_payments

p50 42msp99 187ms12.4k rows/s

Transform with dbt, GitHub, or any tool

Bring your own dbt Cloud or dbt Core project, push models via GitHub, or use Weld's built-in SQL workspace. Develop with Claude Code, Cursor, or GitHub Copilot and manage everything programmatically with the Weld API.

dbt Cloud & dbt Core orchestration

Trigger dbt Cloud jobs via webhooks after syncs, or run dbt Core with your own orchestration layer: Airflow, Dagster, Prefect, or any custom service.

Claude Code, Cursor & VS Code

Build transforms with Claude Code, Cursor, or VS Code with GitHub Copilot. Push to GitHub and deploy automatically with full version history.

Transforms API

Create, read, update, and delete transforms via REST API. Publish revisions, retrieve version history, and integrate with any automation toolchain.

Sync data back to your business tools

Activate warehouse models in CRMs, ad platforms, and internal tools. Row-level diffing, idempotent upserts, and configurable sync cadence.

Keep every team in sync

Ship cleaned customer and product data into Salesforce, HubSpot, ad platforms and more so every team works from the same source of truth.

Audience & workflow automation

Build audiences, triggers and workflows on top of your warehouse models instead of fragile ad-hoc exports.

Governed, observable activations

Centralized monitoring, logging and alerting keep your downstream syncs reliable and auditable.

Weld Connect API

Full programmatic control over connections, syncs, and schedules via REST. Embed ELT pipelines directly into your product with a single API key.

Embed pipelines in your product

White-label data ingestion so your customers can connect their own sources without exposing the Weld UI.

Automate at scale

Programmatically create, configure and manage hundreds of syncs through clean, predictable REST endpoints.

Full lifecycle control

Authenticate, create connections, add streams, enable scheduling and monitor status, all through a single API.

Power RAG and AI pipelines

Feed structured data from any source into vector databases and LLM workflows, fully automated and always up to date.

Explore Weld Connect

POST/elt_syncs

# Create an ELT sync
curl -X POST https://connect.weld.app/elt_syncs \
  -H "Content-Type: application/json" \
  -H "x-api-key: $API_KEY" \
  -d '{
    "connection_id": "conn_abc123",
    "destination_schema_name": "hubspot_data",
    "sync_interval": "0 * * * *"
  }'

// 201 Created
{
  "id": "OoORhGXUVjsqFG",
  "source_integration_id": "hubspot",
  "destination_schema_name": "hubspot_data",
  "enabled": false,
  "status": "NOT_STARTED"
}
▌

Built for global scale

Reliability at scale

20+

Countries with active customers

99.9%

Uptime across all syncs

150,000+

Daily syncs

2.5T+

Records synced annually

SECURITY

Enterprise-grade security

WHITE PAPER

Security White Paper

Our approach to security, compliance, and privacy — covering SOC 2, SOC 3, ISO 27001, HIPAA readiness, encryption practices, and governance.

Read white paper

SOC 2 Type I, II & III

Independent audit of security controls over time. Report available under NDA.

ISO 27001

ISO 27001-certified infrastructure and ISMS practices.

HIPAA

HIPAA-ready processes and controls for PHI where applicable.

End-to-End Encryption

TLS 1.2+ in transit and strong encryption at rest.

Access Control

SSO/MFA and role-based permissions with least privilege.

GDPR Compliant

Privacy-first by design with EU data residency options.

FROM THE BLOG

Insights & updates

The latest on data engineering, product updates, and customer stories.

August 01, 2026·News & Product updates

Weld Product Updates – July 2026

July brought Gmail, Toast Analytics, HTTP File, and Webhooks as new connectors, ClickHouse as a new destination, Reverse ETL management via the Weld Connect API and MCP Server, a smarter GitHub sync, cross-stream deduplication, and updates to Shopify, TikTok Shop, Amazon, Xero, Stripe, and more.

July 23, 2026·Tools & Platforms

How to Build a Shopify Sales Report with SQL

Build a Shopify sales report with SQL that matches your Shopify admin - gross sales, discounts, reversals, net and total sales - with a free BigQuery template.

July 13, 2026·Tools & Platforms

How to Migrate from Snowflake to BigQuery

Learn how to migrate from Snowflake to BigQuery: assess schemas, move and sync data, translate SQL, validate results, dual-run, and cut over safely.

View all posts

CUSTOMER STORIES

The latest success stories from data-driven companies

How eComplete drives measurable impact with a lean, Weld-powered data stack

“Weld gives us the ability to see a huge array of KPIs and data points that we can then feed back to clients in an insightful and actionable way.”

Read the full story

Pritesh Patel, Head of Data and BI at eComplete

How Flatpay optimized marketing efficiency with Weld

“One of the biggest impacts has been unlocking new ways to buy media. Before, we didn’t have the data to back up strategic decisions – now we do.”

Read the full story

Jacob Poulsen, Head of Marketing Expansion at Flatpay

How Holafly transformed data management and scaled globally with Weld

“Before Weld, we had to rely on custom Python scripts and manual processes that were time-consuming and error-prone.”

Read the full story

Rodrigo Andres Valle, Data Engineer at Holafly

How Dishoom scaled data operations without scaling its team

“We’re still a team of three, but we’re often doing far more than the equivalent of three full-time employees. That’s down to how we're able to leverage systems, data, and processes.”

Read the full story