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SPECIFICTION
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Isomer vs OpenCities

Isomer

isomer.gov.sg

OpenCities

granicus.com.au

Side by side

FigureIsomerOpenCities
Price fromFree$458.33/mo
Free planYes—
Free trial——
Open sourceYes—
WebYesYes
API—Yes
Plans published14
Spec score · Government Website Builders8.3 (#5)8.0 (#12)
AccessibilityThe product uses accessibility-focused templates and prompts editors to complete essential accessibility fields.The platform is tested with automated and specialist manual checks and is stated to meet WCAG 2.1 Level AA.
HostingThe Isomer team provides website hosting, maintenance and support for hosted sites.Customer order terms describe managed Azure Government cloud hosting, ongoing security updates and a 99.9% uptime SLA.
IntegrationsClassic Isomer supports whitelisted embeds including VICA, YouTube, Vimeo, FormSG, Data.gov.sg graphs and CheckFirst.Listed integrations include govDelivery, EngagementHQ, US-only Legistar, Eventbrite, ATDW, Spydus, document-management systems and identity connectors.
LicenceThe repository uses the MIT License, subject to Singapore-law and arbitration terms and exclusions for government or third-party assets.Customer terms say OpenCities retains SaaS intellectual property and grant customers no intellectual-property licence to the SaaS components or documentation.
Publishing workflowStudio supports review requests, approvals, and publishing approved changes.Organisation-wide publishing supports departmental content curation, approvals and consistent branding.
PurposeIsomer is a free website builder for government agencies to create and launch static websites without coding expertise.OpenCities helps local governments provide digital interactions through modern websites and website tools.
SecurityIsomer centrally manages security testing and audits, including vulnerability assessment and penetration testing, for hosted sites.Granicus says security experts and security measures guide platform development and support customers to protect data.
SupportThe Isomer team offers training and technical support, and says non-urgent contact requests may take up to five working days to receive a response.OpenCities support is provided through a help centre, tickets and email [email protected].
What it doesIsomer is a static website builder for Singapore government agencies that provides managed hosting while agencies manage site content.OpenCities is a government website and content-management platform for resident information, services, forms and digital interactions.

Plans

Isomer

  • IsomerFree

Isomer pricing →

OpenCities

  • OpenCities Intranet$5,500 a year
  • OpenCities SaaS License$8,000 a year
  • Enhanced Web Package$20,000, paid once
  • OpenCitiesPriced on request

OpenCities pricing →

In their own words

Isomer

Isomer is a free website builder for Singapore government agencies and public healthcare institutions to create static websites without coding. Its Isomer Studio editor lets public officers build, edit, and publish pages with drag-and-drop controls. Publishing supports review requests, approvals, and release of approved changes. Agencies can select page layouts, combine components, and customize colours, logos, and favicons.

Accessibility prompts cover essential fields, while templates and components are designed to support accessible sites. SEO features include predefined headings, generated tables of contents and folder index pages, image alt text, and customizable meta descriptions. Open Government Products builds and manages Isomer. Its team handles hosting, maintenance, support, and compliance with relevant IM8 and Digital Service Standards clauses, and centrally manages security testing and audits. Isomer does not provide website design services or custom layouts. Domain costs and third-party services such as web monitoring may be extra.

Visit isomer.gov.sg

OpenCities

OpenCities has no write-up on Specifiction yet; its figures are above.

Visit granicus.com.au