You’re comparing Weld vs Blendo vs Dell Boomi. Explore how they differ on connectors, pricing, and features. 
Loved by data teams from around the world
| Feature | Weld | Blendo | Dell Boomi |
|---|---|---|---|
| Core Platform | |||
| Price | $79 / 5M Active Rows | Plans start around $100/month (varies by connectors and sync frequency) | Subscription-based (per Atom/connection; starts ~$1000/month) |
| Free tier | No | Yes | No |
| Location | DK, (EU) | Sofia, Bulgaria (HQ) + USA | Austin, TX, USA |
| Connectors & Sync | |||
| Connectors | 200+ | 30+ | 200+ |
| Extract data (ETL) | Yes | Yes | Yes |
| Sync to HubSpot, Salesforce, Klaviyo, Excel (reverse ETL) | Yes | No | Yes |
| Two-Way Sync | Yes | No | Yes |
| Transformations & AI | |||
| Transformations | Yes | No | Yes |
| AI Assistant | Yes | No | No |
| dbt Core Integration | Yes | No | No |
| dbt Cloud Integration | Yes | No | No |
| Governance & DevOps | |||
| Orchestration | Yes | Yes | Yes |
| Lineage | Yes | No | Yes |
| Version control | Yes | No | Yes |
| On-Premise | No | No | Yes |
| OpenAPI / Developer API | Yes | No | Yes |
| Integrations | |||
| Load to/from Excel | Yes | No | Yes (via ODBC/JDBC) |
| Load to/from Google Sheets | Yes | No | No |
| Ratings | |||
| G2 rating | 4.8 | 4.3 | 4.3 |
Overview
Weld is a unified ELT and data activation platform that combines ingestion, modeling, transformations, orchestration, lineage, and reverse ETL in a single SaaS interface. With premium in-house–built connectors, an intuitive UI, and near real-time syncs, Weld enables both technical and non-technical users to create and manage data workflows efficiently. Weld also includes an AI assistant to support SQL modeling, generate transformations, and streamline repetitive tasks. Teams can ingest data from a wide range of sources—including marketing platforms, CRMs, databases, Google Sheets, Excel, and APIs—into their cloud data warehouse and activate it back into business tools.
Lineage, orchestration, and workflow features included by default
Handles large datasets and near real-time data sync
ELT and reverse ETL in one platform
User-friendly interface with minimal setup required
Flat, predictable monthly pricing model
200+ in-house–built, high-quality connectors
AI assistant for modeling and transformations
Some SQL knowledge is useful for advanced modeling
Optimized for cloud-warehouse workflows (Snowflake, BigQuery, Redshift, etc.)
Feature set is streamlined for modern ELT/activation use cases
A reviewer on G2 said:
Overview
Blendo is a cloud-based ETL service focused on collecting data from SaaS tools, particularly marketing, analytics, and CRM platforms and loading it into data warehouses and BI tools. It offers quick setup, automated schema updates, and analytics-ready data models designed for business teams.
Fast setup for popular marketing, CRM, and product analytics connectors.
Supports incremental syncs and automatic schema updates.
Provides analytics-ready metrics models (e.g., MRR, CAC) and optional pre-built dashboards.
Narrow connector catalog focused mainly on marketing and analytics tools.
Only basic transformation support—complex transformations require warehouse or BI tooling.
Pricing increases with more connectors or higher sync frequency.
Blendo Pricing:
“Blendo’s turnkey dashboards and consolidated metrics saved us weeks of manual work—data from all our marketing tools was in BigQuery overnight.”
“Limited customization: cannot define complex transformation logic beyond basic mappings and formatting.”
Overview
Dell Boomi AtomSphere is a cloud-native iPaaS that provides ETL, ELT, API management, B2B/EDI integration, and workflow automation using its Atom runtime architecture. It includes 200+ connectors across SaaS, on-premises systems, and databases. Pipelines and integrations are created in a visual drag-and-drop interface, and Boomi’s lightweight Atom engine can be deployed both in the cloud and on-premise to support hybrid integration scenarios.
200+ connectors for SaaS, databases, on-prem systems, and big data sources.
Hybrid deployment options via Boomi Atoms (cloud, on-prem, or private environments).
Visual process designer with drag-and-drop mapping and component-specific logic.
Built-in version control, error handling, and CI/CD integration.
Licensing costs can increase quickly based on Atom count and connector usage.
Advanced transformations may require scripting (JavaScript or Groovy).
Learning curve for understanding Atom, Molecule, and hybrid deployment models.
Dell Boomi Documentation:
“Boomi’s AtomSphere makes deploying integration processes easy—Atoms can run anywhere, and the visual interface is intuitive for building mappings.”
“Licensing can be expensive, especially for high-volume data. Complex integrations can require coding despite the low-code promise.”
Side-by-side
Weld’s interface is built for clarity and speed, enabling users with varying levels of technical experience to manage data pipelines and models efficiently. Its built-in lineage and orchestration tools provide transparency across workflows.
Blendo provides a simple UI where users authenticate connectors, select objects, and schedule syncs. It's designed for non-technical users who need analytics-ready data with minimal configuration.
Boomi’s Integration Builder provides a web-based canvas for designing integration processes. While the drag-and-drop interface is intuitive for typical workflows, complex multi-step pipelines can become challenging to maintain.
Side-by-side
Weld’s interface is built for clarity and speed, enabling users with varying levels of technical experience to manage data pipelines and models efficiently. Its built-in lineage and orchestration tools provide transparency across workflows.
Blendo provides a simple UI where users authenticate connectors, select objects, and schedule syncs. It's designed for non-technical users who need analytics-ready data with minimal configuration.
Boomi’s Integration Builder provides a web-based canvas for designing integration processes. While the drag-and-drop interface is intuitive for typical workflows, complex multi-step pipelines can become challenging to maintain.
Side-by-side
Weld offers a simple and predictable pricing model starting at $79 for 5 million active rows. This flat, usage-transparent structure makes budgeting straightforward for small and medium-sized teams.
Pricing typically starts around $100/month for a limited number of sources and scheduled syncs. Additional connectors and higher-frequency syncs increase the cost. The free tier supports limited testing.
Boomi uses a subscription model based on Atom runtime usage, connector limits, and transaction volumes. Pricing generally starts around $1,000 per month, with higher tiers for larger workloads. Smaller teams may find the model expensive.
Side-by-side
Weld offers a simple and predictable pricing model starting at $79 for 5 million active rows. This flat, usage-transparent structure makes budgeting straightforward for small and medium-sized teams.
Pricing typically starts around $100/month for a limited number of sources and scheduled syncs. Additional connectors and higher-frequency syncs increase the cost. The free tier supports limited testing.
Boomi uses a subscription model based on Atom runtime usage, connector limits, and transaction volumes. Pricing generally starts around $1,000 per month, with higher tiers for larger workloads. Smaller teams may find the model expensive.
Side-by-side
Weld provides ELT ingestion, SQL-based transformations, reverse ETL activation, data lineage, orchestration, and workflow management in a single platform. Its AI assistant accelerates modeling and transformation tasks.
Blendo offers SaaS connectors, incremental syncs, automated schema handling, optional metrics models, and pre-built dashboards for common analytics use cases. It does not include a full transformation engine.
Key features include ETL/ELT processes, API management, EDI/B2B capabilities, workflow automation, master data management, and data quality tools. The platform also provides monitoring, alerts, and enterprise-level governance capabilities.
Side-by-side
Weld provides ELT ingestion, SQL-based transformations, reverse ETL activation, data lineage, orchestration, and workflow management in a single platform. Its AI assistant accelerates modeling and transformation tasks.
Blendo offers SaaS connectors, incremental syncs, automated schema handling, optional metrics models, and pre-built dashboards for common analytics use cases. It does not include a full transformation engine.
Key features include ETL/ELT processes, API management, EDI/B2B capabilities, workflow automation, master data management, and data quality tools. The platform also provides monitoring, alerts, and enterprise-level governance capabilities.
Side-by-side
Users can model data using SQL enhanced by Weld’s AI assistant, automate workflows, and build custom connectors to any API. This provides strong flexibility for teams that want to tailor integrations and transformations within one platform.
Supports simple field mappings and offers a SQL-based post-load transformation option, but lacks scripting or complex transformation workflows. Best suited for straightforward analytics pipelines.
Boomi supports Groovy and JavaScript for custom transformations, and Atoms can be deployed in any environment for hybrid use cases. Pipelines can be parameterized, integrated with CI/CD, and triggered via REST APIs. As a proprietary platform, core engine enhancements depend on Boomi’s roadmap.
Side-by-side
Users can model data using SQL enhanced by Weld’s AI assistant, automate workflows, and build custom connectors to any API. This provides strong flexibility for teams that want to tailor integrations and transformations within one platform.
Supports simple field mappings and offers a SQL-based post-load transformation option, but lacks scripting or complex transformation workflows. Best suited for straightforward analytics pipelines.
Boomi supports Groovy and JavaScript for custom transformations, and Atoms can be deployed in any environment for hybrid use cases. Pipelines can be parameterized, integrated with CI/CD, and triggered via REST APIs. As a proprietary platform, core engine enhancements depend on Boomi’s roadmap.
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CUSTOMER STORIES
“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.”
“Before Weld, we had to rely on custom Python scripts and manual processes that were time-consuming and error-prone.”
“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.”
“We’ve always been a KPI-driven company. But we wanted to scale that mindset across every team member, every team, every decision.”
“Before Weld, our data infrastructure was limited and we relied heavily on Excel files and custom Python scripts.”
“Weld has saved us a ton of time, from not having data ready to having a fully functional data warehouse and connectors.”
“By integrating Weld, Amazon S3, and Databricks, Soundboks built a modern data pipeline that automates data ingestion, improves reporting, and provides up-to-date visibility into sales performance”
“We didn’t have a good data setup, so we lacked the business insights we needed. Weld has allowed us to set up a structured data infrastructure and access insights quickly.”
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