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Jellyfish delivers integrated digital marketing services across media, creative, content, data, and technology, using AI-enabled tools and global teams to help brands improve campaign speed, efficiency, and performance.
Location
London, Greater London
Founded
2005
Team Size
1,001-5,000
The themes clients raise most, synthesized from 4 verified reviews we read. Each badge counts how many of those reviews raised the point.
Useful engineering analytics
Multiple visible reviews praise Jellyfish for surfacing engineering metrics, sprint data, and team output insights.
Good dashboards and visibility
Reviewers repeatedly mention dashboards, drill-downs, and high-level visibility into team or project work.
Works with Jira/GitHub data
Visible reviews highlight value from integrating Jellyfish with systems like Jira and GitHub.
Reporting limitations
Some reviewers wanted more reports or more customizable reporting options, especially around Jira data and custom reports.
Performance can be slow
One visible review explicitly says the software is slow and laggy to load.
Metrics can miss context
Some visible criticism says metrics may omit offline work or be vulnerable to misuse without proper context.
I found no public self-serve pricing page for Jellyfish's core agency retainers/projects on jellyfish.com; those services appear to be sold via custom quote/contact sales. The strongest concrete public numbers are from Jellyfish's own Training business, where multiple scheduled courses are openly priced at $495 or $549 ex tax for 1-day sessions and $1,099 ex tax for at least one 2-day course. Third-party directories add buyer-qualification signals but should be treated as directory-entered estimates rather than official agency pricing: DesignRush lists a minimal budget of $1,000-$10,000 and Clutch exposes the profile as having hourly-rate/min-project fields, though the accessible snapshot did not show numeric values; GoodFirms lists '< $25/hr', which is likely directory metadata and not a trustworthy representation of this global agency's actual commercial pricing.
Where this pricing information was traced from.
How Jellyfish actually works, reconstructed from customer reviews and third-party write-ups.
Jellyfish appears to run engagements as a strategy-plus-execution partner: it aligns on business goals and metrics, audits the current setup, builds or connects data/reporting infrastructure, then executes campaigns or experimentation in an always-on test-and-learn model with ongoing reporting and optimization. The clearest direct evidence comes from Jellyfish’s own expertise and case-study pages, supplemented by a third-party review and an external case study describing Jellyfish’s onboarding and client-facing workflow.
Jellyfish first works to understand the client’s business and align on strategy and success metrics. Its data team says it acts as an extension of the client team and aligns from the start on strategies and metrics before moving into delivery.
The engagement then moves into assessment of the brand’s current digital, data, or experience setup. Third-party coverage says Jellyfish analyzes a brand’s digital footprint against competitors and runs technical analyses, while Jellyfish case-study language describes clients asking it to audit and plan a roadmap before implementation.
After diagnosis, Jellyfish puts in place the operating foundation for delivery: customized marketing infrastructure, connected platforms and datasets, and bespoke reporting or dashboards. External evidence also indicates Jellyfish has formal onboarding workflows where clients can track progress in a centralized, customer-facing interface rather than through fragmented tools.
Jellyfish then translates the strategy into a concrete plan for activation by defining audiences, journeys, content, or channel tactics. In the HBO case, that meant segmenting key audiences with Optimizely, Google Analytics, and internal data, then defining personalized experiences and a roadmap for implementation.
Execution is hands-on: Jellyfish builds and deploys media, creative, CRM, personalization, or other digital programs on the client’s behalf. Its own pages describe end-to-end delivery from concept to completion, and third-party reporting says its AI-assisted media workflow can automate campaign setup tasks, organize campaign data, and stand up reporting dashboards at launch.
Once live, Jellyfish works in an ongoing test-and-learn cycle, using dashboards, reporting, and experimentation to refine performance. Its site emphasizes bespoke reporting, continuous optimization, and testing, while older company material and external sources point to a transparent model and ongoing client visibility into work and progress.
Customer reviews and third-party write-ups this process was traced from.
How Jellyfish ranks against other Marketing agencies.
Jellyfish has a limited third-party review footprint in the platforms checked here. I found clear listings for Jellyfish on Clutch, G2, Capterra, and BBB, but not a confirmed profile on Trustpilot or Google that I could match confidently to the agency at jellyfish.com. Of the platforms with ratings, G2 and Capterra show the strongest review volume and generally favorable feedback, while Clutch appears listed but unrated and BBB appears as a business profile rather than a customer-review destination.
391 reviews
G2 shows Jellyfish with a strong average rating and high review volume. The visible page emphasizes analytics, historical data consolidation, productivity tracking, and value-stream insights, but I could not directly read individual review text from the accessible page.
18 reviews
Capterra reviewers generally describe Jellyfish as useful for engineering analytics, dashboards, and visibility into Jira/GitHub-based work. Criticisms in the visible reviews mention limited/custom reporting, slow performance in some cases, and concern that some metrics can miss offline work or be misused.
“Ability to get enhanced reports into sprint metrics over the month/quarter”
“Sometimes tricky to drill down into how things like carryover are being labeled”
“Easy to use dashboards that provide information to manage teams. Love the ability to drill down for details. Well organized.”
“Software is slow and laggy. Takes lots of time to load.”
BBB has a business profile for Jellyfish tied to jellyfish.com in Baltimore, Maryland. The profile shows BBB business details and an A+ BBB rating, but I could not confirm visible customer review text or a consumer star rating on the accessible page.
Strengths
Concerns
First-hand reviews from verified Top Sales Agencies members.
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Jellyfish describes itself as an integrated digital marketing business spanning digital performance marketing, generative AI marketing solutions, creative strategy, media strategy and activation, content creation and adaptation, data and analytics, SEO, UX, social media marketing, paid media, digital strategy, and language services/localization.
Jellyfish does not publicly list standard pricing for its core agency services, which appear to be sold on a custom-quote basis. Public pricing is available for Jellyfish Training courses, with listed prices ranging from $495 to $1,099 ex tax per course seat.
Jellyfish is listed in London, Greater London, United Kingdom. The contact address provided is Floor 22, The Shard, 32 London Bridge Street, London, Greater London SE1 9SG, GB.
LinkedIn lists Jellyfish as founded in 2005. Its team size is listed as 1,001-5,000 employees.
Jellyfish has a limited third-party review footprint in the sources checked, but it is listed on platforms including G2, Capterra, Clutch, and BBB. G2 shows a 4.5/5 rating from 391 reviews, and Capterra shows a 4.3/5 rating from 18 reviews; visible Capterra feedback mentions useful dashboards and analytics, along with some concerns about reporting flexibility and occasional slowness.
Jellyfish says its model combines media, creative, and data through technology and generative AI. The evidence also points to proprietary and partner tools such as AI Studios, Share of Model, Social Agents, Switchboard, J+ Bidding, Now Next Soon, and J+ Scribe, plus language services supporting content adaptation in over 150 languages.
Location
Floor 22, The Shard, 32 London Bridge Street, London, Greater London SE1 9SG, GB
Phone
Not publicly listed
Domain registered
September 1998
Last updated
October 2025
Domain age
~27 years
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