As of 28 Oct 2026, the panel rates Contentstack 2.5/5 and Storyblok 3/5 in Content Marketing. Weighted by what each judge cares about, 0 of the 6 judges pick Contentstack and 4 pick Storyblok, 2 call it a tie. Contentstack scores higher on 1 of 7 criteria (Creation, review & approval). Storyblok scores higher on 6 of 7 criteria (Publishing, distribution & integrations, Pricing transparency, Planning, editorial calendar & briefs, plus 3 more). Provenance — Contentstack: Rest of world; Storyblok: EU-Made. Ratings are the AI panel’s opinion, formed from public evidence: how scores are made.
The benches lean differently by criterion, and that difference is the answer. Contentstack leads one criterion, collaboration and approval — 7.0 to Storyblok's 6.5, three judges leaning Contentstack, none Storyblok, three ties. Storyblok's clearest is distribution and integrations — 7.3 to 6.0, six judges leaning its way, no ties — plus pricing transparency, five leans and one tie at 7.2 to 6.3. Content model and reuse draws five ties at means 6.0 to 6.2; AI and content rights draws four at 4.0 to 4.3. Sovereignty splits two judges each way and two ties at 4.2 to 4.3; the captured attributes show unknown ownership and data residency for both, legal entity jurisdiction AT for Storyblok but unknown for Contentstack, whose subprocessor exposure reads US CLOUD Act. Editorial planning is each side's lowest mean, 2.0 to 3.0. Weighted totals favor Storyblok for four judges; the content lead and data protection officer tie.
Choose Contentstack if
You need approval rules with a two-distinct-reviewer minimum against self-advancement — collaboration and approval is the one criterion where the table has Contentstack ahead, 7.0 to 6.5, three judges leaning its way and none Storyblok's.
Your process requires named workflow stages plus an audit log recording each stage transition, both cited in Contentstack's collaboration and approval verdict.
Your editors must not be able to advance their own content past review; the two-reviewer minimum documented in Contentstack's collaboration findings covers that case.
You operate in fallback locales and multi-locale queries — content model and reuse sits at a mean of 6.0 with five judges tying, and Contentstack's verdict cites those capabilities.
Choose Storyblok if
You build delivery around a GraphQL API with webhooks, an app directory and a public status page — distribution and integrations leans Storyblok six judges to zero with no ties, 7.3 to 6.0.
You must see published prices before talking to sales — pricing transparency leans Storyblok five judges to one tie, 7.2 to 6.3, with Growth at 99,00 €/mo including 5 seats, Growth Plus at 349,00 €/mo including 15 seats, published per-unit overages, and a free Starter plan requiring no credit card.
You schedule individual stories with workflow statuses — editorial planning leans Storyblok three judges to zero with three ties, mean 3.0 to Contentstack's 2.0.
Your procurement requires an operator whose legal entity jurisdiction is recorded as AT — the captured attributes list AT for Storyblok, and unknown for Contentstack, whose subprocessor exposure is recorded as the US CLOUD Act.
You want named AI models in the product — two judges lean Storyblok on AI and content rights, 4.3 to 4.0, and its verdict names the models.
Read this comparison as one judge. Each weighs the same scores by what they care about.
The Data Protection Officer
Signs off every tool that stores the company's drafts, author profiles and campaign data. Wants the contracting entity and hosting region named, the subprocessor list with the AI providers on it, prompt retention in days, and training on customer content excluded in the terms rather than in a blog post.
Contentstack
Storyblok
This judge calls it a tie.
Criterion by criterion
Planning, editorial calendar & briefs
Contentstack
The captured documentation shows configurable workflow stages such as Draft, Review and Publish with a Tasks page where assigned users see pending actions, plus users and roles assignable to stages — a status and task view rather than a calendar. We found no public information on an editorial calendar with due dates, grouping of content by campaign or topic, or briefs carrying goal, audience and keywords to the writer.
Storyblok
Publication is staged and scheduled: a default workflow of Drafting, Reviewing and Ready to Publish applies to all content types, stage moves carry an assignee and a due date, and single-story scheduling is a listed plan feature. Beyond an Ideation Room for drafting and improving articles, we found no public information on an editorial calendar across channels, grouping of content by campaign, or briefs carrying goal, audience and keywords. The campaign references we captured are webinar sessions, not product capabilities.
Creation, review & approval
Contentstack
Workflows are configurable per content type with named stages, publishing approval rules, a requirement of at least two distinct reviewers before advancement, and an audit log capturing each stage transition with user and timestamp; custom roles reach entry, field and asset level, and Growth is the self-serve tier carrying custom workflows. We found no public information on comments or inline suggested edits, freelancer access limited to assigned pieces, scheduled publishing that waits for approval, or how long the audit trail is retained after the contract ends.
Storyblok
Workflows are configurable — relevant content types, default stage, edit and publish permissions per stage, stage order and automatic progress — with comments, a history of stage changes, and publication gated to the final stage, while custom workflows and language-specific workflows sit in higher tiers. An approval app that collected email sign-off on a reviewed changelog is documented as discontinued in v2, with discussions and workflows as its successor. We found no public information on mandatory reviewers, freelancer access limited to assigned pieces, or an audit log of every edit, approval and publish with user and timestamp beyond the homepage's mention of audit trails.
Structured content, localisation & export
Contentstack
Content types with shared global fields, locales queried side by side with a fallback locale, and early-access entry variants are documented, and a content type's JSON schema exports from the interface and re-imports with edits retained — though only the latest schema version, without version history. We found no public information on a documented, self-service export of entries, locales and assets; the terms place the sole responsibility for extracting content on the customer at termination.
Storyblok
Content is modelled as fields, blocks and stories under component and content-type schemas, with nestable reusable blocks, reference fields linking entries, datasources for shared terminology, and component definitions inherited across sites from a nominated parent space. Translated stories carry a per-language publication status, and content is delivered as JSON through documented APIs. We found no public information on a documented, self-service export of the whole repository with model and assets, on fallback languages, or on named translation-service connectors.
Publishing, distribution & integrations
Contentstack
The GraphQL Content Delivery API is publicly documented with authentication, a default limit of 80 requests per second per organization, rate-limit headers, regional endpoints across AWS, Azure and GCP in Europe, North America and Australia, live preview and a Postman collection, and a Launch module hosts projects. We found no public information on webhooks on publish or change, an integration marketplace or directory, SDKs, or a public status page.
Storyblok
The GraphQL API is versioned with published rate limits — 100 points per second, status code 429 on excess — and delivery endpoints in a European Union region among five, webhooks can be created, updated and listened to per space, an app directory and a public status page exist, and mobile SDKs are documented. A thirty-day notice for breaking changes and a delivery uptime SLA per plan are written into the terms. We found no public information on performance data per piece pulled back from analytics.
AI assistance & content rights
Contentstack
An organization Owner or Admin can switch AI features off per product, disabled products consume no credits, Contentstack AI Terms of Service must be accepted before first use, and the default model is described only as Contentstack's Managed LLM with customer LLM choice advertised. We found no public information on the underlying model providers, any statement that customer content does not train them, retention of prompts or outputs in days, or who holds the rights to generated output — and no AI provider appears among the named subprocessors.
Storyblok
Model providers and models are named — OpenAI, Google Gemini and Anthropic Claude — features can be enabled or disabled at space or organization level, organizations can require their own credentials, and usage history is filterable by provider, feature, user and space. The general terms route AI use into dedicated AI Terms, but the captured AI Terms pages show only archive periods: we found no public information on prompt or output retention in days, the processing location for AI, a statement in the terms that customer content is excluded from model training, ownership of generated output, or EU AI Act marking of generated text. The published subprocessor list names website, marketing and support providers; the AI providers appear only in the AI documentation.
European sovereignty
Contentstack
The contracting entity is Contentstack Inc. of Austin, Texas under California law with JAMS arbitration in San Francisco, but the privacy policy states European customers' data is stored in an EEA instance in Ireland and Germany, data processing addenda with EU Model Clauses are offered, and an enterprise tier adds a choice of AWS, Azure or GCP. Subprocessors such as Zendesk, Salesforce and Twilio Authy are named without a complete published list with locations, we found no public information on where AI processing happens, and custom data residency is not included on self-serve tiers.
Storyblok
The website operator is Storyblok GmbH, Peter-Behrens-Platz 2, 4020 Linz, Austria, register number FN 479743 f with Austrian court jurisdiction, and a data processing agreement governs customer content under an ISO 27001-certified information security system. The terms state that services are provided by 'a Storyblok Group company, specifically named in your contract', so the contracting entity is not fixed on the public pages, and we found no public information establishing where customer content, assets and AI prompts are stored or processed. The privacy policy publishes a subprocessor list with locations and purposes, though it covers website, marketing and support processing, and the GraphQL delivery API offers a European Union region alongside four others.
Pricing transparency
Contentstack
Every self-serve plan is priced publicly — Free at $0 / month forever, Build at $29 / month, Growth at $299 / month — each with stated users, API calls per month, bandwidth, entries, assets and content types, additional users at $25/user/mo, and Growth named as the tier with custom workflows; fee changes require 30 days' notice and taxes are exclusive. Enterprise is custom-priced, overages are described only as pay-as-you-go without rates, and we found no public information on AI credit pricing, locale limits, or which plan unlocks single sign-on and audit logs.
Storyblok
Self-service plans are fully priced: Starter is free, Growth at 99,00 €/mo and Growth Plus at 349,00 €/mo, each stating seats, traffic, API requests, locales and AI credits, with public unit prices for extras (15,00 €/month per additional user, 75,00 €/month for each 250GB extra, 10,00 €/month per 1M API requests, 20,00 €/month per additional locale, 20,00 €/month per 200k AI credits) and one month free when paying annually. Contract mechanics are stated: a one-year default term, automatic renewal with thirty days' notice, and the tax percentage shown before subscribing. Premium and Elite — the tiers carrying custom roles and workflows, SSO and SCIM — are priced 'Custom' and enterprise overages are billed at Order Form rates, so an annual cost is computable only for the self-service tiers.
Sovereignty, side by side
Dimension
Contentstack
Storyblok
Legal entity
Not determined
Not determined
Ownership
Not determined
Not determined
Data residency
Not determined
Not determined
Subprocessors
US CLOUD Act reach
Not determined
Facts, side by side
Only facts both products carry under the same definition — anything else would not be a fair row.
As of 28 Oct 2026, the panel rates Storyblok higher: 3/5 against 2.5/5. Weighted by what each judge cares about, 0 of the 6 judges pick Contentstack and 4 pick Storyblok, 2 call it a tie. Which one fits depends on the criteria that matter to you; the table on this page shows both side by side, and each judge’s reading has its own page. Both were scored by the same AI bench under the same rubric, from public evidence only, as the methodology describes.
Is Contentstack or Storyblok European?
Contentstack is not European by provenance (Rest of world). Storyblok is European (EU-Made). Provenance is read from each company’s own legal pages: who builds it and who owns it.
Do Contentstack and Storyblok have a free plan?
As of 28 Oct 2026, both vendors’ own pages state a free plan. Each product page links the pricing page it was read from.