Short answer: SaaS growth marketing agencies run experiments across paid, organic and lifecycle channels to find what grows signups and revenue, then scale what works. This page lists seven firms that describe themselves on their own websites as doing this work for SaaS or B2B tech companies, and describes each using only what its site states. It is a shortlist to start from, not a verdict on which is best.
- What this is: seven companies in alphabetical order, not ranked.
- How it was built: each description comes from the company’s own site.
- What to compare: main focus, who they serve, and how they report results.
Who wrote this: Next Reply publishes this page. We are not on the list, because we are a cold email agency. The companies appear in alphabetical order. Each description uses only what the company says about itself on its own website, which we opened while writing this page. We have not tested these companies and we do not repeat review scores, awards, client names, results or prices. Check each site yourself, because offers change.
What does a SaaS growth marketing agency do?
A SaaS growth marketing agency runs experiments across channels to find what grows signups, pipeline and revenue fastest, then scales what works. The mix often includes paid media, landing pages, conversion testing, lifecycle email and analytics. The label is broad, so check which channels each agency actually runs.
Which SaaS growth marketing agencies should you compare?
| Company | Main focus | Stated audience |
|---|---|---|
| GrowthSpree | Paid acquisition and ABM | B2B SaaS and tech |
| Hey Digital | Paid demand generation | B2B SaaS companies |
| Ironpaper | B2B demand and ABM | Complex-sale B2B tech |
| Kalungi | Outsourced SaaS marketing team | Early-stage B2B SaaS |
| NoGood | Full-funnel growth squads | Startups to enterprise brands |
| Skale | Organic growth via SEO/GEO | SaaS and tech brands |
| Stratabeat | Organic search and CRO | B2B SaaS and tech |
GrowthSpree
GrowthSpree positions itself as an AI-native marketing agency built for B2B SaaS and B2B tech growth, running paid acquisition, ABM, and HubSpot-based RevOps, and pairing human teams with AI marketing agents. Its site lists Google Ads, LinkedIn Ads and Meta Ads management, account-based marketing, demand generation, RevOps and HubSpot implementation/migration, SEO, AEO and GEO and AI marketing agents. It says it serves B2B SaaS and B2B tech companies from early-stage startups to scaleups. Location stated on its site: Noida, India and New Hyde Park, New York, USA.
Hey Digital
Hey Digital describes itself as a performance marketing agency dedicated to B2B SaaS, using paid advertising and creative to build scalable demand generation that feeds pipeline and revenue. Its site lists PPC, paid social, demand generation, video ads, landing page design, account-based marketing, growth marketing and creative strategy. It says it serves B2B SaaS companies across growth stages. We did not find an office location on the pages we checked.
Ironpaper
Ironpaper calls itself a specialized B2B growth agency that combines marketing, content and sales enablement to help companies with long, complex sales cycles generate demand and pipeline. Its site lists account-based marketing, demand generation, growth strategy, lead generation, content strategy and thought leadership, sales enablement and website design and digital. It says it serves B2B companies with complex sales processes, including SaaS, B2B software, IT, IoT and technology firms. Location stated on its site: New York, NY.
Kalungi
Kalungi presents itself as a full-service marketing agency exclusively for B2B SaaS, offering outsourced CMO leadership plus execution aimed at predictable pipeline and growth, with done-for-you, done-with-you and self-serve playbook options. Its site lists CMO-as-a-service and CMO coaching, account-based marketing, RevOps and HubSpot optimization, branding and design, paid media, content and SEO and web development. It says it serves B2B SaaS companies from pre-product-market-fit through roughly $10M ARR. Location stated on its site: Kirkland, WA.
NoGood
NoGood describes itself as an AI-native growth marketing agency that assembles custom growth squads blending paid, organic, creative, answer-engine optimization and analytics. Its site lists AEO and SEO, organic social and social ads, paid search, performance branding and creative, content marketing, CRO and marketing analytics, fractional CMO and consulting and lifecycle and video marketing. It says it serves startups, scaleups and large brands, with verticals including SaaS, B2B, fintech, healthcare, consumer and AI. Location stated on its site: New York City, with offices in Miami and Dubai.
Skale
Skale calls itself an AI-search-first organic growth agency for SaaS and tech companies, running GEO and SEO as one system and reporting on new recurring revenue rather than rankings. Its site lists generative engine optimization, AI brand mentions, SaaS SEO strategy and execution, link building and outreach, content production and website migrations. It says it serves SaaS and tech brands, speaking to executives, growth leaders and SEO/content managers. We did not find an office location on the pages we checked.
Stratabeat
Stratabeat describes itself as an organic growth agency for B2B companies focused on traffic, leads and pipeline, blending SEO, GEO and content with audience research and a strong conversion-optimization emphasis. Its site lists SEO, generative engine optimization, content strategy and development, Reddit marketing, digital PR and authority building, web design, web analytics and conversion rate optimization. It says it serves B2B companies, especially SaaS and tech, plus fintech, MedTech, cybersecurity, IT and B2B manufacturing. We did not find an office location on the pages we checked.
Growth marketing vs demand generation vs performance marketing
These labels overlap, and agencies use them loosely. Roughly:
| Label | Usually means | Main measure |
|---|---|---|
| Growth marketing | Experiments across the whole funnel | Signups, activation, revenue |
| Demand generation | Building awareness and pipeline with target buyers | Pipeline and opportunities |
| Performance marketing | Paid media optimized to conversions | Cost per demo or signup |
When an agency calls itself a growth agency, ask which channels it actually runs in-house, and whether it touches activation and retention or only acquisition.
How do you choose a SaaS growth marketing agency?
- Which channels they run in-house. “Growth” can mean paid ads only or a full team.
- How experiments are chosen. Ask for their testing process and how fast they move.
- Data access. They will need your analytics and CRM to measure results properly.
- Stage fit. Growth programs need enough traffic or budget to test against.
- Terms. Contract length, notice period, and who owns the accounts and content if you leave.
Where does outbound fit?
Growth marketing brings in buyers through one set of channels. Outbound reaches a chosen list of companies that fit your product before they start looking. Many SaaS companies run both. For the wider picture, see our list of SaaS marketing agencies and our SaaS lead generation strategies.
Want conversations with specific accounts? Next Reply builds a signal-based list, sends the outreach, and texts you when a buyer replies. You approve every list first, and your first campaign is live in 14 days. See SaaS lead generation →
Frequently asked questions
What does a SaaS growth marketing agency do?
A SaaS growth marketing agency runs experiments across channels to find what grows signups, pipeline and revenue fastest, then scales what works.
When is a SaaS company ready for a growth agency?
Usually once there is enough traffic, signups or ad budget to run experiments that reach a clear answer. Very early companies often learn more from founder-led sales first.
Is this list a ranking?
No. The companies are in alphabetical order, and each description comes only from the company’s own website.
How do I check an agency before hiring it?
Ask for examples of similar work, who will do the work, how results are reported, and what the contract terms are. Speak to a current client if you can.
Want to talk about outbound for your product?
Tell us who you sell to and we will map out a first campaign.