ExpressCSV alternative that never charges for an extra import
Updog renders inside your own page and works from the columns you set in code, with no server of its own and no token to fetch before it opens.
100% client-sideWhite-labelFlat $19/domain/month
Updog and ExpressCSV at a glance
| Dimension | Updog | ExpressCSV |
|---|---|---|
| Data privacy | Files are parsed, validated, and edited in the browser. Row data never reaches Updog's servers, so there is no data processor, DPA, or residency to manage. | Parsing and validation run in the browser, inside an iframe served from ExpressCSV's own domain, and validated rows go back to your page. The homepage states that user data never touches ExpressCSV servers, with zero retention. The DPA summary names ExpressCSV as the processor for customer import data, with receiving files inside its processing scope, and offers a signed DPA on request. Import-session events reach ExpressCSV for billing and reliability, and the AI features send sample values to OpenRouter. GDPR and CCPA are stated; no SOC 2 or ISO certification found. |
| White-label | Full styling through CSS variables and class overrides. No Updog logos or "powered by" on any plan, including the free one. | Theme variables for color, radius, and typography, with separate light and dark values, a system color mode, fonts from Google Fonts or your own URL, and custom CSS scoped to the importer's public ecsv- class names. The header title is yours to set. No vendor badge or branding-removal tier found. |
| Pricing | Free for development, and a 14-day trial with no card when you go live. In production, a flat $19 per domain per month, the same at any volume, and your first paid domain includes a free one for staging. | Public and self-serve. The free plan covers development only. Production needs a paid plan, in US dollars, from Startup at $35 a month with 500 imports, then Growth at $80 with 1,000 and Scale at $270 with 20,000. Each extra import costs $0.50, $0.25, or $0.15 by plan. The managed AI features need a paid plan. |
| Data mapping | Schema in code. Fuzzy column matching with a built-in synonym dictionary you can extend, or connect the AI your organization already approves through a hook, so it runs on infrastructure you control with no new AI vendor to clear. Updog keeps no mapping history. Your app owns that state and can supply saved selections on later imports. Maps incoming values to your options. Auto-detects number and date formats. Combines files by upserting on a key. | Schema in code through TypeScript helpers, where each field carries a label, a description, and column-name aliases. Managed matching runs an exact, case-insensitive, and normalized pass first, then optional AI inference on whatever is still unmatched, which sends those headers and sample values to ExpressCSV. You can route matching to your own endpoint instead. A separate step maps incoming values to your select and multi-select options, and no mapping history is kept between imports. |
| Data cleaning | Cells edit inline through a typed editor per column, from text, email and url through number, boolean, date and time to select, multiselect, country and currency, with clipboard, fill handle, and full undo and redo. Values pass a transform on the way in, then validation runs at three levels, built-in rules, your own checks, and asynchronous ones. Sorting, full-text search, filters on the columns you enable, and formulas. Invalid rows can block submit or come through flagged. Any view also exports in any supported format. | The review step is an AG Grid data table with inline edits, undo and redo, valid and invalid tabs, per-column filters, type-aware sorting, column pinning, and export of the selected, filtered, or full set as CSV or Excel. Validation covers the built-in field types plus your own checks, sync or async and batched across a column, and a failing check can return a one-click suggested fix. Invalid rows block Finish. On paid plans a user can describe a change in a prompt, which ExpressCSV turns into JavaScript, runs in a sandbox, and applies to the grid. |
| Scale & performance | About one million rows at around 20 columns in the browser, with a filter on every column. No fixed row cap, the browser tab's memory is the ceiling, and fewer columns reach further. Filtering and sorting run in a worker, measured at 30 to 250 milliseconds over a million rows. | Everything runs in the browser. No row cap, file-size cap, or large-file guidance is published, so the browser tab's memory is the ceiling. Development keys return only the first 100 rows, so full files run on a paid plan. The homepage times the first validated record at 220 milliseconds. |
| Integration | React component, plus a Web Component for Vue, Angular, Svelte, and vanilla JS. Renders inline in your page's DOM. Imports CSV, TSV, Excel, JSON, and XML, plus any other format through a parser you register yourself. | A React package and a framework-agnostic TypeScript SDK, with quickstarts for Next.js, Vue, Nuxt, Angular, and Svelte. The importer opens as a full-screen iframe from ExpressCSV's domain. Your backend must expose a route that trades a secret key for a short-lived token. The file picker accepts CSV, text, Excel, ODS, and Numbers files, one file per import. |
| Languages & RTL | English by default, with every interface string overridable, so you can localize into any language. Right-to-left is first-class. It flips layout, text alignment, scrollbars, and column pinning, and carries through to export. | English only, with every user-facing string overridable through a partial locale object, including the accessible labels. No built-in locales beyond English and no right-to-left support found. |
| Accessibility | An ARIA grid with full keyboard navigation and screen-reader support. WCAG 2.2 AA is the level Updog builds to, with automated rule checks over every component and every step of the importer on each test run. Updog holds no independent audit or VPAT. | No accessibility statement or VPAT found. The review step is built on AG Grid, which carries grid roles, keyboard navigation, and clipboard support, and the dropzone and column menu have accessible labels you can translate. The importer runs in an iframe, so its ARIA relationships stop at that boundary. |
ExpressCSV's homepage states that user data never touches its servers with zero retention, while its DPA summary names ExpressCSV as the processor for customer import data and its retention page lists rows, headers, and delivery payloads among the categories it handles for the active workflow. Facts checked against ExpressCSV's public pages in September 2026.
Which one fits your team
ExpressCSV may fit better if
- You want schema, validation, and delivery written in TypeScript, with the imported row type inferred in your app.
- You want AI that matches messy headers and edits values from a prompt, hosted by the vendor, with no AI provider of your own to connect.
- You want rows delivered in chunks with session and delivery ids, so your backend can stage, retry, and commit an import safely.
- You want the importer served from the vendor's domain, updated without a redeploy on your side.
Updog may fit better if
- You want an importer and spreadsheet editor embedded in your own app.
- You want to match your app's design exactly, styling the editor with your own CSS through variables and class overrides.
- You want to handle large files in the browser, with nothing stored on a server.
- You want flat, public pricing with no per-import fees.
- You want to use the AI your organization already approves, with no new vendor to clear.
Questions people ask
Is Updog a drop-in replacement for ExpressCSV?
No. Updog renders in your page's DOM and needs no backend, while ExpressCSV opens a full-screen iframe from its own domain and needs a route on your server that issues a token first. Updog is also a spreadsheet editor that opens on existing data.
How do the two handle data privacy?
Both parse and validate in the browser. Updog has no server mode, so row data never reaches Updog. ExpressCSV's homepage states that user data never touches its servers, and its DPA summary names ExpressCSV as the processor for customer import data.
How does Updog pricing compare?
Updog is a flat $19 per production domain per month, free in development. ExpressCSV's paid plans start at $35 a month for 500 imports, and each import past the plan's count is charged separately.
Can Updog handle large files like ExpressCSV?
Yes, about 1 million rows in the browser, bound by the machine's memory. ExpressCSV publishes no row or file-size limit, so it is likewise bound by browser memory. Its development keys return only the first 100 rows.
Can Updog be used to view or edit existing data, without an import?
Yes. Load existing data straight into Updog's editor to view and edit it, with a read-only mode. ExpressCSV's review grid belongs to the import flow, which starts with a file.
Does either product need a backend?
Updog runs with the columns set in your code and no server of its own. ExpressCSV needs a route on your backend that exchanges your secret key for a short-lived token before the importer opens.
How do the two handle accessibility?
Updog's grid uses ARIA semantics with full keyboard navigation and screen-reader support, and the importer is checked against WCAG 2.2 A and AA rules on each test run. Updog holds no independent audit or VPAT. No accessibility statement was found for ExpressCSV. Its review step is built on AG Grid, so it carries grid roles and keyboard navigation, and it runs in an iframe, so its ARIA relationships stop at that boundary.
Can the interface be translated, and does right-to-left work?
Updog ships in English with every interface string overridable, so you can localize into any language, and it renders right-to-left layouts natively. ExpressCSV also ships in English with every string overridable, including its accessible labels, and no right-to-left support was found.
See how Updog compares to other CSV importers
Try Updog for free
Install the package, add your columns, render the component. Free on localhost and preview domains. Every feature included.