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Dromo vs OneSchema in 2026

Dromo and OneSchema compared on what each does, what each costs, how each is set up and what to check before you pick one for CSV field mapping.

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Dromo and OneSchema compared on what each does for CSV field mapping, what each costs, how each is set up and what to check before you pick one for importing contact files.

Dromo is an import tool whose page says it uses GPT to automatically map imported columns to your schema [1]. OneSchema's page says it can ingest files uploaded from SFTP, API, S3, email, or native API connectors to enterprise systems of record [2]. RoloDexter maps contact field names onto a canonical schema of 62 fields through a four-layer pipeline (exact, normalized, fuzzy, heuristic) [3]. OneSchema's Individual plan costs $20 per month [4], with 4,000 free credits and then $0.012 per credit [4]. RoloDexter is free, with no paid tier [3]. Dromo's page does not give a dollar price for its plans, so that price is not published here [1].

OptionFree to usePaid planPer-credit feeDeploy
OneSchema4,000 free credits [4]Individual plan costs $20 per month [4]$0.012 per credit after included credits [4]US, EU, CA and AU region hosting or self-hosted deployments based on AWS, GCP and Azure [2]
DromoFree plan for new customers to experiment on [1]Usage-based plan bills monthly and can be cancelled anytime [1]; unlimited plan at a flat annual rate [1]; price not publishednot publishedSelf-hosted via Kubernetes in your own cloud [1]; integration typically less than 30 minutes [1]
RoloDexterFree, no paid tier [3]No paid tier is stated; it is free [3]No per-credit fee is stated [3]Installed with pip or npm [3]; runs locally without an API key [3]

The short answer

Dromo says it uses GPT to automatically map imported columns to your schema [1]. OneSchema's page says it ingests files uploaded from SFTP, API, S3, email, or native API connectors [2]. Dromo's page says it uses GPT to automatically map imported columns to your schema [1]. OneSchema's page says it ingests files uploaded from SFTP, API, S3, email, or native API connectors [2]. RoloDexter maps contact field names onto a canonical schema of 62 fields [3] and records a confidence score for each field match [3].

Dromo's page covers automatic mapping with GPT [1], white labeling on every plan [1], and self-hosted deployment via Kubernetes [1]. OneSchema's page says it covers file ingestion from several sources [2], configurable data retention [2], and encryption at rest and in transit [2]. RoloDexter's claims cover local field mapping with no API key [3], confidence scores [3], and value normalization [3].

What Dromo and OneSchema are built for

Dromo's page says it uses GPT to automatically map imported columns to your schema [1] and that integration typically takes less than 30 minutes [1]. Every Dromo plan includes full white labeling at no extra cost, and all plans are white label out of the box [1] [1]. When embedded in your site and run in Private Mode, Dromo operates entirely in the web browser [1]. You can deploy Dromo via Kubernetes and host it in your cloud infrastructure [1]. Dromo states it is SOC 2 Type II certified [1]. The Headless API is a premium add-on that gives a fully customizable import pipeline with API and SFTP support [1] [1].

OneSchema's page says you can upload files or data from SFTP, API, S3, email, or any native API connector to enterprise systems of record [2]. It uses fine grained access controls so only authorized users can view schemas and import data [2]. Data at rest is encrypted with AES-256 and TLS v1.2 is used in transit [2]. OneSchema is SOC 2 Type 2, SOC 3, GDPR, CCPA and HIPAA compliant, with data stored in US data centers [2], and offers configurable data retention policies that default to 7 days [2]. Its page also describes AI agents working on messy files larger than 10GB [2]. It offers US, EU, CA and AU region hosting, or self-hosted deployments based on AWS, GCP and Azure [2].

What RoloDexter is built for

RoloDexter is made by the team that publishes this site.

It maps contact field names onto a canonical schema of 62 fields through a four-layer pipeline: exact, normalized, fuzzy, and heuristic, where the heuristic layer detects emails, phones, URLs and postal codes by data shape [3]. Each field match records a confidence score and the strategy that produced it [3]. It cleans matched values, for example phones to E.164, countries to ISO 3166-1 alpha-2, and unambiguous dates to ISO-8601 [3].

It can pull phone numbers out of free-text values such as notes [3]. The command line tool reports the match rate, which fields were populated, which headers went unmapped and how many warnings there were, without writing mapped output [3]. You can resolve headers once and replay that plan on later runs with a JSON plan file [3]. Core mapping runs locally without an API key [3]. An optional i18n generator calls Google Translate once, as a separate step you run yourself, to build cached language data for 40 languages [3].

Pricing and fees

Dromo offers a Free plan for new customers to experiment on, then a usage-based plan that bills monthly and can be cancelled anytime [1], and it recommends an unlimited plan at a flat annual rate [1]. Dromo's page also says there are no hidden fees or surprise upcharges, including for monthly billing or white labeling [1]. The Dromo sources given here do not state a dollar price, so it is not published here [1].

OneSchema's Individual plan costs $20 per month [4], and after included credits are used it charges $0.012 per credit, with 4,000 free credits [4]. Enterprise includes self-hosting on AWS, Azure or GCP [4].

RoloDexter is free, and no paid tier is stated [3]. It is released under the MIT licence [3]. No per-credit fee is stated in its sources.

Setting it up and daily use

Dromo's page says integration typically takes less than 30 minutes [1]. When embedded in your site and run in Private Mode, it operates entirely in the web browser [1], and you can deploy it via Kubernetes and host it in your cloud infrastructure [1]. The Headless product offers an API and SFTP support for a customizable import pipeline [1]. The Dromo sources here say nothing more about its routine use.

OneSchema's page says you upload files or data from SFTP, API, S3, email, or native API connectors [2], and that data retention defaults to 7 days and can be deleted programmatically via API [2].

RoloDexter is installed with pip or npm [3], and the Python package needs Python 3.10 or newer [3]. Daily, the command line tool converts CSV and JSONL files with strict, override and dedupe options [3], and a streaming command processes large exports in constant memory [3]. With the pandas extra, a command renames and normalizes a pandas DataFrame [3].

Things to check before you choose

Ask where the import must run. Dromo can run embedded in the browser in Private Mode [1] or self-hosted via Kubernetes [1], OneSchema offers US, EU, CA and AU hosting or self-hosting [2], and RoloDexter runs locally without an API key [3].

Check how the columns are mapped. Dromo's page says it uses GPT to map columns [1], and RoloDexter's claims describe a four-layer matching pipeline with confidence scores [3] [3]. Check OneSchema's own pages for how its mapping works, since the facts here do not cover it.

Check cost and compliance. OneSchema's Individual plan costs $20 per month [4] and charges $0.012 per credit after included credits [4]; Dromo's price is not published here, so ask for a quote before committing.

How to choose

If you want automatic column mapping, Dromo's page says it uses GPT to map imported columns to your schema [1].

If you want an embedded import running in the browser, Dromo's page describes Private Mode [1], and a self-hosted option via Kubernetes [1].

If you want flexible file ingestion with data retention and encryption controls, OneSchema's page describes SFTP, API, S3, email and native connectors [2], 7-day default retention [2], and encryption [2].

If you want field mapping that runs locally with no API key, with confidence scores and value normalization, RoloDexter's claims describe that [3] [3] [3].

If you want a free tool with no paid tier, RoloDexter's claims say that [3].

Frequently asked questions

Does Dromo map columns automatically?

Dromo's page says it uses GPT to automatically map imported columns to your schema [1], and that integration typically takes less than 30 minutes [1]. The facts here do not describe the mapping in more depth, so check Dromo's own pages for the details of how the automatic mapping behaves before you rely on it.

How much does OneSchema cost?

OneSchema's Individual plan costs $20 per month [4]. It includes 4,000 free credits, and after those are used it charges $0.012 per credit [4]. Enterprise includes self-hosting on AWS, Azure or GCP [4]. The facts here do not give a price for the Enterprise tier beyond that.

How much does Dromo cost?

Dromo offers a Free plan for new customers, then a usage-based plan that bills monthly and can be cancelled anytime [1], and it recommends an unlimited plan at a flat annual rate [1]. The sources here do not give a dollar price, so the price is not published. Ask Dromo for a quote before deciding.

Is RoloDexter free and open source?

RoloDexter is free, and no paid tier is stated [3]. It is released under the MIT licence [3]. Core mapping runs locally without an API key [3]. The sources here do not state any paid tier or per-credit fee, so the only price they give is free.

Does OneSchema handle data securely?

OneSchema's page says data at rest is encrypted with AES-256 and TLS v1.2 is used in transit [2], that it is SOC 2 Type 2, SOC 3, GDPR, CCPA and HIPAA compliant with data stored in US data centers [2], and that fine grained access controls limit who can view schemas [2]. It also offers configurable data retention policies that default to 7 days [2].

RoloDexter is free; there is no paid tier. [3]

Try RoloDexter

Sources

  1. Dromo, dromo.io, read 2026-10-09
  2. OneSchema, oneschema.co, read 2026-10-08
  3. RoloDexter's own description of itself (the product of this site's publisher)
  4. OneSchema, oneschema.co/pricing, read 2026-10-08

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