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 Web Engineer
Builds the website and the integrations the content flows through. Wants a versioned API with published rate limits, webhooks on publish, preview environments, and a migration CLI that works in both directions — and reads "headless" as a promise about the API, not a logo.
Contentstack
Storyblok
This judge's pick
Criterion by criterion
Planning, editorial calendar & briefs
Contentstack
We found no public information on editorial planning in the pages we read — the homepage, pricing, workflow and roles documentation show no calendar, briefs, campaign or topic grouping, or per-person due-date views. The workflows documentation describes review stages and a Tasks page for pending workflow actions, which is approval tracking rather than turning a content strategy into scheduled work.
Storyblok
The workflow machinery carries dates and owners — stages from Drafting through Reviewing to Ready to Publish with an assignable person or role, a due date and an email notification for each stage — and every paid plan includes single-story scheduling, while an AI Ideation Room drafts and improves article ideas. The campaign material I read is a gated webinar about a 'Campaign House' framework rather than a product feature, and I found no public information on an editorial calendar across channels, on grouping content by campaign or topic, or on briefs that carry goal, audience and keywords to the writer.
Creation, review & approval
Contentstack
Workflows are the real thing: named stages, approval rules, a two-distinct-reviewer minimum against self-advancement, multiple workflows per content type and per branch, and an audit log capturing who moved an entry and when. Five predefined roles plus custom roles with permissions down to entry, field and asset level separate writing from publishing, with workflows gated per plan. We found no public information on comments or inline suggested edits, on freelancer access limited to assigned pieces, or on publishing scheduled to wait for approval.
Storyblok
Workflows are genuinely configurable: stages can be defined per content type with rules for who edits and who publishes at each stage, automatic progress and stage order, publishing in the default workflow is gated to the Ready to Publish stage, comments are recorded on each stage change with a history tab, stage changes can fire a webhook, and language-based workflows track the publication status of translated stories. The homepage promises 'Enterprise-grade roles, workflows, approvals, and audit trails', and custom workflows plus SSO and SCIM sit in the Premium and Elite plans. I found no public information on mandatory named reviewers, inline suggested edits, guest or freelancer access limited to assigned pieces, or an audit log of every edit, approval and publish with user and timestamp; a separate Approval app with email sign-off was discontinued in version 2 in favour of discussions and workflows.
Structured content, localisation & export
Contentstack
The model is genuine structure: content types with global fields, reference datatypes, JSON rich text queryable over GraphQL, fallback locales, multi-locale fetches in a single request, and entry variants in early access. Export is documented for a content type's JSON schema via the UI or the Content Management API, editable and re-importable with edits retained — but only the latest schema version, without version history. We found no public information on exporting entries, assets or locales, or on migration tooling in both directions.
Storyblok
This is a real content model, not pages: fields, nestable blocks and stories are defined through components and content types, reference fields link entries to one another, datasources hold shared terminology, a block library with folders and tags keeps components organised, and a shared-components app lets a space inherit every component definition from a nominated parent space. Locales are a first-class priced dimension, language-based workflows manage the publication status of each translated story, and delivery is JSON over documented REST and GraphQL APIs, with a preview space for testing changes before production. I found no public information on field-level localisation with fallback languages, on market or audience variants, on named translation-service connectors, or on a self-service export that carries content, model, locales and assets out together.
Publishing, distribution & integrations
Contentstack
The GraphQL delivery API is documented the way I want APIs documented: GET and POST, GraphiQL explorer, introspection, a Postman collection, read-only delivery tokens, endpoints across AWS, Azure and GCP in North America, Europe and Australia, and published rate limits — 80 requests per second per organization by default, plan-dependent, with X-RateLimit headers and HTTP 429 — plus live preview and dedicated infrastructure endpoints. On the ecosystem side we found no public information on webhooks on publish, SDKs, a connector marketplace, a public status page, or named third-party CMS, CRM, analytics or SEO integrations; Launch hosts your project and Lytics CDP is the vendor's own product.
Storyblok
My home ground, and the evidence is strong: a versioned GraphQL API — v2 current with v1 still addressable by changing the path — a published rate limit of 100 points per second with HTTP 429 on exceed, per-query cost estimation, cached requests free and automated schema documentation; a Management API whose webhook endpoints can be created, updated and deleted and which pushes Storyblok events to other applications, including workflow stage changes. Around it sit mobile SDKs in an open-source ecosystem, an app directory and app store for maintained connectors, framework support for Next.js, Astro, Nuxt, React, Vue, Symfony and Angular, a public status page, per-plan uptime SLAs measured on the Content Delivery API, and breaking changes contractually announced at least 30 days in advance with a termination-and-refund remedy. I found no public information on performance data per piece pulled back from analytics or attributed per channel, which is what the top of this scale asks for.
AI assistance & content rights
Contentstack
AI administration is real: a Global AI Settings page with per-product toggles, an Enable All action, credit consumption that stops when a product is disabled, admin permissions required, and first-time acceptance of separate AI terms of service. The default model is Contentstack's Managed LLM, with no underlying provider named in the captures. We found no public information on whether customer content trains models, on prompt or output retention, on output ownership, or on labelling of generated text — the EU AI Act appears only as a criterion the vendor's Canoe product applies to third-party sources.
Storyblok
Model transparency is unusually good: OpenAI, Google Gemini and Anthropic Claude are each named with specific model versions, admins enable AI features at space or organization level, organizations can supply their own credentials and default style groups, natural-language output rules shape brand voice, and usage history is filterable by provider, feature, user and space — all metered in credits explained as a model-dependent multiple of token cost. But the AI terms appear in these pages only as an archive of effective-date versions, so I found no public information on whether customer content trains the models, on opt-out, on retention of prompts and outputs, on where AI is processed, or on who holds the rights to generated output — the things a buyer of AI features needs in writing.
European sovereignty
Contentstack
The contracting entity is Contentstack Inc. of Austin, Texas, under California law with San Francisco arbitration, and the default data location is the United States, with an EEA instance storing European customers' data in Ireland and Germany — excluding data shared with subprocessors outside the EEA. Data Processing Addenda with EU Model Clauses are offered, and enterprise buyers can choose AWS, Azure or GCP plus custom residency, which the pricing page lists as not included on the self-serve tiers. We found no public information on a published subprocessor list for the content platform or on where AI processing runs; the named subprocessors cover vendor operations such as Zendesk, Salesforce and Twilio Authy.
Storyblok
The legal notice establishes an Austrian operator — Storyblok GmbH, Peter-Behrens-Platz 2, 4020 Linz, register number FN 479743 f, with the Regional Court Linz as competent court — a data processing agreement is offered, ISO 27001 certification is claimed, and the privacy policy publishes subprocessors with names, addresses and purposes. The general terms, however, place provision with a Storyblok Group company 'specifically named in your contract', so the contracting entity's jurisdiction is not established on these pages, service hosting is stated as AWS without a region, and the GraphQL API offers a European Union region alongside the United States, Canada, Australia and China. I found no public information on where customer content, backups or AI prompts are stored and processed.
Pricing transparency
Contentstack
A buyer can compute a real monthly cost: Free at $0 forever, Build at $29 per month, Growth at $299 per month with ten users and extra users at $25/user/mo, each tier stating API calls per month, bandwidth, entries, assets, content types and custom domains, with pay-as-you-go overages on Build and custom workflows plus two custom roles arriving at Growth; Enterprise is custom-priced with 6M+ API calls and 5 TB+ bandwidth. We found no public information on overage rates beyond the per-user price, on AI credit pricing, on where SSO and audit logs begin, or on the cost of exporting content — while the terms place the burden of extracting content on the customer at termination.
Storyblok
The self-service tiers are unusually computable: Growth at 99,00 €/mo monthly including 5 seats with more at 15,00 €/month, extra traffic at 75,00 €/month for each 250GB, extra API requests at 10,00 €/month per 1M, additional locales at 20,00 €/month each, and AI credits at 20,00 €/month per 200k above the 100k included; Growth Plus at 349,00 €/mo with 15 seats, 1TB traffic, 4M API requests, 10 locales and 200k AI credits; one month free on annual billing, no setup fees, VAT shown before subscribing, and the terms state a default one-year term, annual payment in advance, thirty-day non-renewal notice and non-refundable fees. But custom roles and workflows, SSO, SCIM and the higher SLAs are named only for Premium and Elite, priced 'Custom', and the FlowMotion workflow tiers are 'Contact Sales' — so the annual cost for a team that needs approval workflows or SSO is a sales conversation, and I found no public information on a content-record limit on the pricing pages.
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.