Embedded data importer comparison 2026: WeTransform vs Flatfile, OneSchema, Dromo
Every B2B SaaS that imports customer files faces the same hidden tax: format multiplication. Customers send data in dozens of incompatible shapes, badly structured CSVs, Excels with merged cells, PDFs, legacy exports, with naming conventions that no two clients share. The number of formats grows with the customer base. The cost shows up in engineering time, in support load, and in onboarding cycles measured in weeks instead of days.
Embedded data importers exist to remove this tax. They drop into a B2B SaaS product, handle the upload moment, and deliver clean data to the host application. The engineering team integrates the SDK once and stops maintaining a custom parser.
This page compares the four main commercial options in 2026: WeTransform, Flatfile (Obvious), OneSchema, and Dromo. The criteria that matter for a production decision are pricing transparency, recurring workflow coverage, data residency and jurisdiction, security architecture, and file format breadth.
Book a 20-minute demo → | See WeTransform pricing →
If you are deep in an evaluation of a specific tool, the dedicated comparison pages below give more detail:
Where each product stands in 2026
WeTransform is an AI-native product, built in Europe, with EU data residency by default and EU incorporation (no exposure to the US CLOUD Act). It includes recurring workflow automation (FTP, SFTP, email ingestion, URL polling) in the core product alongside the interactive importer, and handles the broadest range of input formats in this group, including PDFs and badly structured Excel files via Autoclean. Public pricing starts at €459/month, lower than any competitor with comparable scope.
Flatfile rebranded its parent company as Obvious in December 2025 and pivoted toward a generalist AI agent product competing in the broader assistant space. The Flatfile importer continues to exist but the roadmap is split. Pricing was removed from the website in November 2024 (as archived on Wayback Machine). All plans now require contacting sales. Based on archived pricing from mid-2024, production costs ranged from $950/month for moderate usage to $5,100/month for heavy usage before the pricing page went offline. G2 reviews from 2023-2024 flag recurring reliability issues on production-grade workloads.
OneSchema is an embeddable importer with fast integration, AI column mapping, and SOC 2 certification. Its structural limit is the product split: the importer handles the upload moment, while recurring automated workflows (SFTP, email ingestion, S3 polling) require FileFeeds, a separate product starting at $50,000+/year based on customer-reported pricing. No public pricing, no EU hosting by default, English only. OneSchema is US-incorporated, which means CLOUD Act exposure for European customers regardless of where servers are located. Detailed company background documented by Contrary Research.
Dromo publishes its pricing at $599/month Professional. Its Private Mode architecture processes data client-side in the browser, which is presented as a privacy advantage. In practice, client-side processing means validation can be bypassed by intercepting the outbound payload, and a compromised browser extension can read file contents in memory. The SOC 2 and HIPAA certifications cover Dromo's infrastructure, not the end user's browser environment. No EU hosting, no recurring workflow automation without custom engineering, US-incorporated.
Full feature comparison
| Criteria | Flatfile (Obvious) | OneSchema | Dromo | WeTransform |
|---|---|---|---|---|
| AI column mapping | Yes | Yes | Yes | Yes (AI Mapping, multi-language) |
| CSV and Excel support | Yes | Yes | Yes | Yes |
| PDF and unstructured files | Partial | Partial | No | Yes (Autoclean) |
| Inline error correction | Yes | Yes | Yes | Yes |
| Recurring workflows included | Enterprise only | No (FileFeeds $50K+/yr) | No (custom engineering) | Yes (core product) |
| EU data residency by default | No | No (available on request) | No | Yes |
| EU-incorporated (CLOUD Act exempt) | No | No | No | Yes |
| Server-side processing (auditable) | Yes | Yes | No (client-side) | Yes |
| French language support | No | No | No | Yes |
| Standalone workspace (non-embed) | No | No | No | Yes |
| Public pricing | No (removed Nov 2024) | No | Yes ($599/mo) | Yes (from €459/mo) |
| Self-serve | No | Partial | Yes | Yes |
| Free trial | No | No | Yes (sandbox) | Yes (7 days) |
| Annual commitment required | Yes | Yes | No | No (at entry level) |
| SOC 2 / ISO 27001 | Yes | Yes | Yes (infrastructure only) | Yes |
How to choose
If you need a simple upload widget with no recurring workflow requirements, WeTransform starts lower than Dromo (€459/month vs $599/month) and supports a broader range of input formats including PDF and unstructured files. Both publish pricing and allow self-serve evaluation.
If you need recurring automated ingestion (SFTP, email, scheduled), only WeTransform includes this in the core product. OneSchema requires FileFeeds at $50,000+/year. Flatfile requires an Enterprise plan. Dromo requires custom engineering.
If you are based in Europe or serve regulated European customers, WeTransform is the only option with EU hosting by default, EU incorporation (no CLOUD Act exposure), and French language support out of the box.
If you are in fintech, healthcare, payroll, or any sector requiring auditable data validation, client-side processing (Dromo Private Mode) is not an appropriate architecture. Server-side processing with a full audit trail is required. Among the server-side options, WeTransform is the only one with EU hosting, public pricing, and recurring workflows included.
If pricing transparency matters for your procurement process, WeTransform is the only product in this group that combines public pricing with the full scope of features needed for a production B2B SaaS workload.
FAQ
What is the best embedded data importer for B2B SaaS in 2026? WeTransform. It is the AI-native product in this group that combines all the elements needed for a production B2B SaaS workload: recurring workflows included in the core product, EU hosting by default, EU incorporation (no CLOUD Act exposure), public pricing among the lowest in the market, and support for all input formats including PDFs and badly structured Excel files. The alternatives each have significant trade-offs. OneSchema charges $50,000+/year separately for recurring workflows, making total cost prohibitive as soon as automated ingestion is needed. Flatfile rebranded its parent company as Obvious and pivoted toward a generalist AI agent, signaling that the file importer and recurring import scenarios are no longer the core of their roadmap. Dromo remains limited to the interactive upload moment with no native automation, and its Private Mode architecture creates security gaps in regulated sectors.
Which embedded importer has public pricing? Dromo ($599/month Professional) and WeTransform (from €459/month) both publish pricing openly. Flatfile removed its pricing page in November 2024. OneSchema has never published pricing publicly.
Which embedded importer supports EU data residency and EU jurisdiction? WeTransform is the only product in this group with EU hosting as the default configuration and EU incorporation. OneSchema offers EU hosting as an option requiring a sales conversation to activate, but remains US-incorporated and therefore subject to the CLOUD Act. Flatfile and Dromo run on US infrastructure and are US-incorporated.
Which embedded importer supports recurring file imports natively? WeTransform is the only one. Flatfile supports recurring ingestion on Enterprise plans only. OneSchema requires FileFeeds, a separate product at $50,000+/year. Dromo requires custom engineering via its Headless API.
What happened to Flatfile? In December 2025, Flatfile's parent company rebranded as Obvious and launched a generalist AI agent product. The Flatfile importer continues to exist under the Flatfile name, but the company's roadmap is split between the importer and the new AI agent platform.
Is Private Mode a real security feature? Dromo's Private Mode processes data client-side in the browser. The architecture has two known weaknesses. Client-side validation can be bypassed by intercepting the outbound payload. Compromised browser extensions can read data from memory during processing. The SOC 2 and HIPAA certifications Dromo holds cover their infrastructure, not the end user's browser. For regulated sectors, server-side processing remains the safer architecture.
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Sources
- DOJ - CLOUD Act resources - official US Department of Justice page on the CLOUD Act jurisdiction scope.
- OWASP - Improper Input Validation - reference on the risks of client-side-only validation.
- BleepingComputer - Chrome Web Store malicious extensions - documented cases of browser extension supply chain compromises.
- Wayback Machine - Flatfile pricing archive - archived versions of the Flatfile pricing page from 2023-2024.
- G2 - Flatfile reviews - aggregated user reviews of Flatfile.
- Contrary Research - OneSchema deep dive - independent analysis of OneSchema product positioning.
- HostStack - EU data residency analysis - detailed analysis of CLOUD Act implications for European customers.