You’re comparing Weld vs Census vs Mozart Data. Explore how they differ on connectors, pricing, and features. 
Loved by data teams from around the world
| Feature | Weld | Census | Mozart Data |
|---|---|---|---|
| Core Platform | |||
| Price | $79 / 5M Active Rows | Free tier available; Pro plans start around $350/month | Starts around $1,000/mo (includes Snowflake + ETL up to ~250k MAR) |
| Free tier | No | Yes | Yes |
| Location | DK, (EU) | US | US |
| Connectors & Sync | |||
| Connectors | 200+ | 130+ | 150+ |
| Extract data (ETL) | Yes | No | Yes |
| Sync to HubSpot, Salesforce, Klaviyo, Excel (reverse ETL) | Yes | Yes | No |
| Two-Way Sync | Yes | No | No |
| Transformations & AI | |||
| Transformations | Yes | No | Yes |
| AI Assistant | Yes | No | No |
| dbt Core Integration | Yes | Yes | Yes |
| dbt Cloud Integration | Yes | No | No |
| Governance & DevOps | |||
| Orchestration | Yes | Yes | Yes |
| Lineage | Yes | No | No |
| Version control | Yes | Yes | No |
| On-Premise | No | No | No |
| OpenAPI / Developer API | Yes | Yes | No |
| Integrations | |||
| Load to/from Excel | Yes | No | Yes |
| Load to/from Google Sheets | Yes | Yes | Yes |
| Ratings | |||
| G2 rating | 4.8 | 4.5 | 4.6 |
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
Census is a reverse ETL platform that syncs data from cloud data warehouses into operational tools such as Salesforce, HubSpot, Marketo, Google Sheets, and Slack. It works directly on warehouse tables or dbt models and focuses on reliable, incremental syncing to support operational analytics and data activation use cases.
Warehouse-native: syncs directly from tables or dbt models
No-code field mapping with live previews
Broad destination support across CRM, marketing, and productivity tools
Incremental upserts help maintain clean, deduplicated records
Deep dbt integration and support for analytics-as-code workflows
Flexible scheduling with cron, triggers, and API-based execution
Reverse ETL only—requires a separate tool for ingestion and transformation
Usage-based pricing can become costly at high volumes
Complex logic must be handled upstream in the warehouse or dbt
Sync performance depends on destination API limits
Cloud-only platform without on-prem deployment options
Census Overview (G2):
“Census is the fastest and most reliable reverse ETL platform with strong uptime and responsive support. It delivers transformed data directly from the warehouse into operational tools without requiring complex pipelines.”
Overview
Mozart Data is a managed data stack platform that combines ETL connectors (via embedded partners such as Fivetran and Portable), a fully managed Snowflake data warehouse, and dbt-based transformations in a single subscription. It is designed to help teams set up a complete analytics stack quickly without requiring engineering resources.
Managed Snowflake warehouse bundled with connectors and dbt transformations.
150+ connectors (via Fivetran and Portable integrations) managed behind the scenes.
Very fast onboarding—stack can be operational in under an hour.
Hands-on customer support and onboarding assistance through Mozart Assist.
Pricing scales with both warehouse compute and Monthly Active Rows, which can become costly at larger volumes.
Limited flexibility for custom connector development—requests must be routed through the Mozart team.
Smaller ecosystem and fewer third-party learning resources compared to standalone tools.
Mozart Data Reviews (G2):
“Mozart Data provided a turnkey stack where Snowflake, connectors, and transformations were already configured. We were able to start building dashboards rapidly without DevOps work.”
“Costs can increase with higher data volumes, and adding niche connectors typically requires requesting support from their team rather than configuring them directly.”
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.
Census offers a clean interface with intuitive field mapping, previews, and validation steps. Non-technical users can configure operational syncs with minimal setup.
Mozart Data abstracts away infrastructure management entirely. Users select sources through a simple UI, and the platform configures Snowflake, connectors, and transformations automatically, reducing setup time for non-technical teams.
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.
Census offers a clean interface with intuitive field mapping, previews, and validation steps. Non-technical users can configure operational syncs with minimal setup.
Mozart Data abstracts away infrastructure management entirely. Users select sources through a simple UI, and the platform configures Snowflake, connectors, and transformations automatically, reducing setup time for non-technical teams.
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.
Census includes a free tier for basic use, while paid plans scale with usage. Costs can increase with high sync volumes, making it more suitable for teams with predictable operational data needs.
Mozart uses a bundled pricing model that starts around $1,000 per month for smaller workloads. It can be cost-effective for teams that value reduced operational overhead but may be more expensive for high-volume or highly custom requirements.
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.
Census includes a free tier for basic use, while paid plans scale with usage. Costs can increase with high sync volumes, making it more suitable for teams with predictable operational data needs.
Mozart uses a bundled pricing model that starts around $1,000 per month for smaller workloads. It can be cost-effective for teams that value reduced operational overhead but may be more expensive for high-volume or highly custom requirements.
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.
Census focuses on reverse ETL functionality, including incremental syncs, no-code mapping, dbt model syncing, scheduling, monitoring, and alerting. It provides an API and CLI for integration into GitOps workflows.
The platform includes a managed Snowflake warehouse, automated ELT connectors via partners, dbt-based transformations, monitoring tools, and scheduling capabilities. It supports incremental loading and basic orchestration without additional infrastructure.
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.
Census focuses on reverse ETL functionality, including incremental syncs, no-code mapping, dbt model syncing, scheduling, monitoring, and alerting. It provides an API and CLI for integration into GitOps workflows.
The platform includes a managed Snowflake warehouse, automated ELT connectors via partners, dbt-based transformations, monitoring tools, and scheduling capabilities. It supports incremental loading and basic orchestration without additional infrastructure.
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.
Users can sync any warehouse table or SQL model, schedule syncs flexibly, and configure failure handling. Customization is primarily driven by upstream SQL and dbt transformations, aligning with analytics-engineering workflows.
Mozart supports SQL and dbt for transformations but restricts more advanced customization. New connectors or unsupported APIs require submitting a request, and users cannot directly create custom connectors or deploy code-based logic inside the platform.
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.
Users can sync any warehouse table or SQL model, schedule syncs flexibly, and configure failure handling. Customization is primarily driven by upstream SQL and dbt transformations, aligning with analytics-engineering workflows.
Mozart supports SQL and dbt for transformations but restricts more advanced customization. New connectors or unsupported APIs require submitting a request, and users cannot directly create custom connectors or deploy code-based logic inside the platform.
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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.”
AWARD WINNING ETL PLATFORM
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