Carbone vs G Merge Plus
Carbone
carbone.io
G Merge Plus
gmergeplus.comSide by side
| Figure | Carbone | G Merge Plus |
|---|---|---|
| Price from | Free | $6/mo |
| Free plan | Yes | Yes |
| Free trial | Yes | Yes |
| Open source | Yes | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| API | Yes | — |
| Self-hosted | Yes | — |
| Plans published | 18 | 3 |
| Spec score · Mail Merge Software | 9.4 (#1) | 8.0 (#11) |
| Headquarters | Bellevigny, France | Boulder, Colorado, USA |
| Integrations | Official connectors cover Airtable, Bubble, Glide, Make, n8n, Ninox, Retool, Zapier, HubSpot, Odoo, Pipedrive, Salesforce, DocuSign and Subnoto. | The site identifies Gmail, Google Sheets, Google Docs, Google Drive, and the Google Workspace Marketplace as part of its workflow and availability. |
| Purpose | Carbone merges JSON data into document templates and generates files such as PDF, DOCX, XLSX and PPTX. | G Merge Plus provides mail merge, email marketing, and document generation from Google Sheets. |
| Support | The Essential plan includes chat support from 9 AM to 6 PM UTC+2, with asynchronous email responses outside those hours. | The security policy says support is available 24x5 with an average first response time of two hours; Enterprise support includes Hangout and phone support. |
Plans
Carbone
- Cloud FreeFree
- FreeFree
- On-Premise CommunityFree
- On-Premise FreeFree
- Amazon Web Services$0.15, paid once
- Cloud Essential$29 a month
- Essential€29 a month
- Cloud Essential Plus$95 a month
- Essential Plus€95 a month
- Advanced€159 a month
In their own words
Carbone
Carbone merges JSON data into document templates to generate files such as PDF, DOCX, XLSX, and PPTX. Templates can use formats including DOCX, ODT, ODS, XLSX, XML, Markdown, and HTML. Its conversion API handles more than 100 formats and supports LibreOffice, OnlyOffice, and Chromium. API access and bulk generation are listed, with Cloud, On-Premise, Private Cloud, and AWS deployment options. The pricing page lists free Cloud and On-Premise plans, plus a free 30-day trial for self-hosted On-Premise use. Cloud Essential costs $29.00 per month; documents are counted for each 1 MB of injected JSON and images, and additional documents beyond a plan allowance are invoiced separately. Carbone says Cloud stores templates for reuse but does not retain submitted JSON or generated documents beyond what rendering and delivery require. It says it has no access to customer templates, data, or generated documents in on-premise deployments. The service also offers an MCP server and an open-source Carbone Skill for connecting AI assistants and generating templates. Its listed platform options include API, Linux, macOS, self-hosted, web, and Windows.
G Merge Plus
G Merge Plus creates personalized documents and email campaigns from Google Sheets. It can combine a sheet with a document template to generate PDFs, Google Docs, or Sheets, then send personalized messages from the user's Gmail address with generated documents attached. Merges can be queued for later or scheduled to recur. Delivery and open reports appear in the Sheet, and the marketing section also describes click tracking. Campaigns can include one-click unsubscribe; opt-outs are recorded in the Sheet and skipped on the next send. Reusable email and document templates are available, with shared templates listed for the Team plan. The workflow includes Gmail, Google Sheets, Google Docs, and Google Drive. G Merge Plus uses Google Sign In and says it does not access Gmail passwords. It says email and generated document contents are not stored, and generated files are kept in the user's Drive. The free plan has unlimited mail merge but no document merge or tracking, and is subject to Google limitations. Pro is $72 a year; Team is $480 a year.