Top 10 SaaS Lead Generation Agencies in 2025

Let’s be honest — finding a lead generation partner for your SaaS company is rough. Some agencies promise the moon and deliver... cold email lists scraped from LinkedIn. Others speak in vague buzzwords and dodge any talk of actual numbers. And then there are the ones that look good on paper but ghost you after onboarding.

But great agencies do exist. And if you know what to look for, you’ll find one that actually delivers qualified leads — not vanity metrics.

In this post:

• Red flags to avoid when picking a SaaS lead gen agency
• What the best agencies actually do differently
• A list of top-performing SaaS lead generation partners in 2025.

Why Picking the Wrong Lead Gen Partner Costs More Than Money

The obvious problem with a bad agency is wasted ad spend. But the real cost is deeper:

• You lose time — months spent chasing unqualified leads.
• You burn your audience — with aggressive outreach that damages your brand.
• You miss growth windows — while your competitors figure it out.

And in SaaS, where sales cycles are long and CAC can spiral quickly, this sets you back quarters, not weeks.

How to Spot a SaaS Lead Gen Agency Worth Your Budget

So what separates the top 5% of agencies from the rest?

Here’s what we’ve seen across hundreds of campaigns:

1. They don’t rely on scraped lists or cold outreach alone

If someone tells you they have a “proprietary database,” there’s a good chance it’s just a glorified LinkedIn export. Good agencies go beyond that. They build intent-based funnels using paid search, high-signal content, and strategic partnerships.

2. They measure the right things

Not just lead volume. But:

• Qualified lead rate (MQLs that actually convert)
• Cost per opportunity
• Time-to-first-meeting
• Pipeline velocity

If an agency can’t talk about these metrics, they probably aren’t focused on them.

3. They understand your ACV and model

The approach for a $300/mo self-serve tool is wildly different from a $50K enterprise platform. A good partner tailors everything — channels, messaging, funnel length — to your price point and sales process.

4. They test fast and iterate

No six-month waiting game. You should see learnings (and early signals) within weeks, not quarters. Ask how often they test landing pages, headlines, audience segments, and CTAs.

5. They talk like strategists, not service providers

A great agency doesn’t just “run ads” or “send leads.” They bring ideas to the table. They challenge assumptions. They sound like part of your growth team.

Top SaaS Lead Gen Agencies to Watch in 2025

Here’s a list of 10 agencies that consistently deliver results for B2B SaaS — from early-stage startups to enterprise platforms.

1. Aimers - Performance Marketing for SaaS & Tech

Specialization: Paid media & CRO for B2B SaaS.

Aimers takes a performance-first approach with a strong focus on real pipeline impact. Instead of vanity metrics, they build full-funnel systems tailored to your ACV and sales cycle. One campaign for an AI detection platform doubled conversions in a single quarter through smarter messaging and CRO.

Why choose them:

• Expertise in Google Ads, LinkedIn, landing pages, and CRO
  
  
• Fast learning loops and transparent reporting
  
  
• Focused on MQL-to-SQL quality, not just lead volume.
  
  

Clients: Mixpanel, Demio, Originality.ai, AbbaDox, etc.

2. Refine Labs

Specialization: Demand generation & revenue marketing.

Known for flipping the traditional MQL model on its head, Refine Labs works with growth-stage SaaS teams to build long-term demand. If you’re Series B+ and ready to move from lead capture to true pipeline creation, this is your partner.

3. GrowthMate

Specialization: LinkedIn outreach & ABM.

Ideal for high-ticket SaaS and longer sales cycles, GrowthMate blends outbound with smart personalization. Their team builds custom sequences, not templates — and focuses on account-level insights over mass outreach.

4. Single Grain

Specialization: Full-funnel SaaS marketing.

Single Grain combines paid media with content strategy to drive inbound interest. Strong in SEO, YouTube Ads, and retargeting — they’re a solid choice if you’re investing in omnichannel growth.

5. Cleverly

Specialization: LinkedIn lead generation.

Cleverly has productized LinkedIn outreach for scale. If you have a well-defined ICP and want plug-and-play outbound, they offer a clear, low-lift starting point — especially for early-stage SaaS teams.

6. NoGood

Specialization: Growth marketing for SaaS & DTC.

NoGood blends creativity with experimentation. Their cross-functional teams cover paid acquisition, content, and CRO — often acting as an embedded growth squad inside your org.

7. Kalungi

Specialization: Full-stack marketing for B2B SaaS.

Kalungi is best for early-stage startups that need to build from scratch — GTM positioning, messaging, and a scalable funnel. Their fractional CMO model is ideal for seed-to-Series A teams.

8. Hey Digital

Specialization: Paid media for B2B SaaS.

Hey Digital is hyper-focused on Google and LinkedIn Ads for SaaS. They create clean, high-converting landing pages and obsess over CAC and SQLs. Best suited for teams who’ve validated their funnel and want scale.

9. Powered by Search

Specialization: SEO & paid acquisition for SaaS.

With a deep bench in SaaS SEO and paid search, Powered by Search works well for companies targeting multiple verticals. They’ve published some of the most tactical SaaS case studies in the space.

10. Tuff

Specialization: Agile growth teams for startups.

Tuff plugs into your team as an on-demand growth arm — covering paid acquisition, CRO, and analytics. Ideal if you need traction fast, and want to validate channels without hiring full-time.

Final thoughts

The best lead gen agencies don’t sell leads. They build scalable systems that generate interest, qualify intent, and drive pipeline.

And they do it in a way that respects your brand and your customer’s time.

Growing a SaaS product is hard enough — finding the right lead gen partner shouldn’t make it harder. If you're tired of generic promises and looking for a team that actually gets SaaS, let’s talk.

No fluff, no pressure — just a real conversation about what’s working, what’s not, and where we can help.

👉 Reach out to the Aimers team — we’re here when you're ready.