Isomer
Isomer: A focused, free CMS for eligible public-sector teams building informational websites. Ranked #26 of 33 in Government Website Builders by our editors (6.1/10); pricing: Free plan; best for small agencies seeking a free visual CMS.
At a glance
- Editor score6.1 / 10
- PricingFree plan
- Best forSmall agencies seeking a free visual CMS
- Free planYes
- Paid fromFree
- Accessibility standardNot_stated
- Founded2018
- Facts checked20 Sep 2026
Where it wins
- Free hosting and CMS access for eligible public-sector organisations
- Visual editing, previews, approvals and three defined editor roles
- Collections, file publishing and accessibility-oriented content controls
Where it doesn't
- Eligibility is limited to Singapore government and public healthcare organisations
- Focused on informational sites rather than highly customised transactions
- No verified multilingual publishing or public content API
Our verdict on Isomer
Isomer is a free website builder and content management system for Singapore government agencies and public healthcare institutions. It is designed for public officers who need to create, organise and publish informational websites without coding. Hosted infrastructure, prescriptive layouts and visual editing support a controlled publishing process, while customisable colours, logos and favicons allow each site to maintain its own identity. The product is a focused fit for public-facing information rather than highly customised transactional services.
Content management is its clearest strength. Teams can create site pages with drag-and-drop editing, preview layouts across device dimensions, and route content through review and approval workflows before publishing. Admin, Publisher and Editor roles provide three defined levels of access. Folders, overview pages and collections help organise content, while collection search and filtering support larger information sets. Isomer also supports uploading and publishing files such as PDFs and spreadsheets, which suits agencies that publish forms, reports and guidance documents.
Accessibility-oriented headings, alt text and tables of contents are built into the feature set, giving teams practical controls for structuring public information. The platform is open source and free to use, with the Free plan covering the website builder and hosting for eligible organisations. Its main trade-off is focus: agencies seeking a highly customised transactional service, broad integrations or a wider publishing ecosystem may need a different platform. Isomer should appeal to small public-sector teams that value a visual workflow, managed hosting and straightforward governance over extensive customisation.
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Isomer fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Accessibility standard | Not_stated |
| Multilingual publishing | Not verified |
| Editor roles | 3 |
| Page limit | Not verified |
| Document management | Yes |
| Multi-site support | Not verified |
| API access | Not verified |
| Deployment | Cloud |
| Platforms | Web |
| Support | Email, Live chat, Docs |
| Built for | Mid-market, Enterprise (editorial estimate) |
| Pricing | Free plan (source) |
| Website | isomer.gov.sg |
| Facts checked | 20 Sep 2026 |
Alternatives to Isomer
- Single Digital PresenceA managed Drupal platform for government teams needing structured, accessible publishing.9.4
- Government Site BuilderAn open-source TYPO3-based foundation for reusable government web publishing.9.2
- govAccessA configurable government CMS for forms, workflows, microsites, and multi-channel publishing.8.9
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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