Most lists of the best outbound marketing agencies copy each other, rank whoever paid to be included, and wrap it up with zero real insight.
I’ve spent years running outbound campaigns for B2B companies across cold email, LinkedIn, and multi-channel outreach, and I’ve seen what actually moves the pipeline versus what just generates activity reports.
This list is built from that experience, not from a directory submission.
If you’re a B2B founder, sales leader, or growth team trying to fill your pipeline without waiting six months for inbound to kick in, this guide gives you 10 outbound marketing agencies worth seriously evaluating, along with a clear breakdown of who each one is actually built for.
Top Outbound Marketing Agencies (Quick Comparison Table)
| Agency | Primary Channels | Pricing (Est.) | Website |
|---|---|---|---|
| UltraGrowthMedia | Email, LinkedIn | Custom | Visit site |
| Callbox | Email, Phone, LinkedIn, Social | $4,300–$15,000/mo | Visit site |
| Martal Group | Email, LinkedIn, Phone | $3,600–$8,000/mo | Visit site |
| Leadium | Email, Phone, Research | Custom | Visit site |
| SalesRoads | Cold Calling, Email | $9,500/cycle | Visit site |
| CIENCE Technologies | Email, Phone, LinkedIn, Ads | $5,000–$10,000/mo | Visit site |
| Belkins | Email, LinkedIn, Phone | $3,000–$8,000/mo | Visit site |
| Operatix | Email, Phone, LinkedIn | Custom (perf. options) | Visit site |
| SalesCaptain | Email, LinkedIn, Automation | Custom | Visit site |
| Revboss | Cold Email, Ads | From $2,500/mo | Visit site |
The 10 Best Outbound Marketing Agencies in 2026
1. UltraGrowthMedia
If you want results-driven outbound without a bloated retainer and a six-month ramp-up, UltraGrowthMedia is the first outbound sales agency I'd point you to.
Built specifically for ambitious B2B brands, UltraGrowthMedia runs outbound campaigns that combine cold email outreach and LinkedIn lead generation into one coordinated system.
Lead sourcing, ICP targeting, copywriting, A/B testing, and real-time reporting are all included.
What separates them from most outbound marketing agencies is execution speed.
Most agencies spend the first 30 days "onboarding." UltraGrowthMedia moves faster, and their campaigns are built around actual buyer intent, not template blasts.
Their lead research service means outreach starts from a clean, verified list of decision-makers matched to your exact ICP.
The cold email sequences are written by specialists, and the LinkedIn outreach is handled by people who understand B2B social selling, not bots running generic connection requests.
- Full-service cold email + LinkedIn lead gen under one roof
- Fast execution with no lengthy onboarding delays
- Real-time reporting and transparent campaign visibility
- No long-term contracts
- 100% white-hat outbound — no spammy tactics
- Not a fit for pure cold calling or phone-heavy outbound
- Best suited for B2B rather than B2C companies
2. Callbox
Callbox is one of the longest-standing names among top outbound marketing agencies.
Founded in 2004, they've built a reputation on multi-channel, multi-touch campaigns that combine email, phone, LinkedIn, and social outreach into a single coordinated execution.
Their proprietary CRM and sales automation platform, Pipeline, gives clients real-time visibility into campaign performance, which puts them ahead of agencies still running manual reporting out of spreadsheets.
Callbox is particularly strong for companies targeting enterprise accounts or running complex B2B sales cycles that require multiple touchpoints before a meeting gets booked.
Their global footprint covers North America, Asia-Pacific, EMEA, and Latin America.
The tradeoff is cost and complexity.
Callbox isn't the right pick for lean startups or teams that want a tight, nimble outbound machine. Their model is built for scale.
- True multi-channel execution across 5+ touchpoints
- Proprietary Pipeline CRM for real-time campaign visibility
- Strong global coverage and cross-border lead gen capability
- 20+ years of B2B outbound experience
- Higher cost — not ideal for smaller budgets
- Limited G2 reviews (2.5/5), though Clutch shows 4.6/5 across 46 reviews
- Model can feel heavy for companies that want lean, fast campaigns
3. Martal Group
Martal Group runs a fractional SDR model that embeds their sales reps directly into client CRMs and outbound workflows.
They work primarily with technology companies across North America, with deep experience in SaaS, IT services, and healthcare tech.
What makes Martal stand out among top outbound marketing agencies is how well they blend AI-enhanced targeting with human execution.
They use intent data and verified prospect signals to improve timing, so outreach lands when buyers are more likely to be in-market, not just whenever a sequence fires.
Their SDR team is made up of North American professionals with experience across 50+ industries, and their fractional model means you get a dedicated rep without the overhead of a full-time hire.
The pricing scales based on SDR allocation, campaign length, and optional add-ons like data enrichment and CRM integration, so you can start lean and expand as results come in.
- Strong SaaS and tech vertical expertise
- Fractional SDR model integrates directly into your sales process
- AI-enhanced timing and intent-based targeting
- Flexible pricing — retainer or performance-based options
- Costs scale quickly as campaigns expand
- Less effective outside of tech and SaaS verticals
4. Leadium
Leadium is a solid choice for companies that need a full outbound sales agency extension, not just campaign execution, but actual SDR staffing.
Their model wraps lead research, account targeting, outreach, and qualification into one managed service.
This makes them a strong fit for SaaS teams and mid-market B2B companies that want top-of-funnel support without the cost and ramp time of building an internal SDR function.
Where Leadium differentiates is the depth of research.
Most outbound sales agencies use broad data lists. Leadium's team does account-level research before outreach begins, which means messaging can be genuinely tailored rather than just name-personalized.
- End-to-end SDR service including research and qualification
- Strong account-level targeting and data quality
- Works well as an extension of internal sales teams
- Good fit for mid-market and SaaS companies
- Positioning and messaging must come from you — they execute, not strategise
- Less ideal for very early-stage companies still defining their ICP
5. SalesRoads
SalesRoads is the right choice when phone-led outbound is the priority.
They run entirely U.S.-based SDR teams that focus on live conversations, outbound calling, and appointment setting, and they're one of the few outbound marketing agencies that still emphasize cold calling at this level of quality.
Their strength is qualification.
SalesRoads reps don't just connect; they have real, consultative conversations that filter out low-quality leads before anything reaches your internal team.
Full call recordings, detailed conversation notes, and meeting outcomes are shared with clients, which makes it easy to track what's working.
They're not the cheapest option among top outbound sales agencies, and they're not built for LinkedIn-heavy or email-first strategies.
But for industries where phone conversations close more deals than cold email, like financial services, healthcare, and manufacturing, SalesRoads has the track record to back it up.
- U.S.-based SDRs with strong consultative phone skills
- Full call recordings and detailed reporting for accountability
- High-quality qualification — not just volume
- Solid track record in complex B2B sales cycles
- No proprietary tech platform — clients manage their own tools
- Limited LinkedIn and programmatic ad coverage
- Higher per-cycle cost compared to email-first agencies
6. CIENCE Technologies
CIENCE is one of the most recognized names among top outbound marketing agencies, and for good reason.
Their model combines a "people-as-a-service" structure with proprietary software. Meaning you get both the human execution and the data infrastructure in one package.
Their managed SDR teams integrate research, prospecting, and personalized outreach, and they run coordinated campaigns across email, phone, LinkedIn, and programmatic advertising simultaneously.
For companies that need serious scale, CIENCE removes the need to assemble multiple vendors for each channel.
They've worked with enterprise clients including Microsoft, Google, Uber, Salesforce, and Okta, which signals they can handle complexity.
The tradeoff is cost.
CIENCE sits toward the higher end of outbound sales agency pricing, and the model can be more than what lean teams actually need.
If you're running a tight operation that doesn't need multi-channel enterprise orchestration, there are lighter-weight options on this list.
- True multi-channel outbound including programmatic ads
- Intent data and audience intelligence built in — no extra vendor needed
- Proven at enterprise scale with major brand clients
- Proprietary platform for campaign orchestration and tracking
- Higher pricing — significant investment for smaller teams
- Model complexity can slow down early-stage execution
- Best suited for companies with a defined ICP and clear messaging already in place
7. Belkins
Belkins has been one of the most trusted names in B2B appointment setting since 2017.
They've worked with 1,000+ clients and built a strong reputation specifically in the tech and SaaS space, running multi-channel outreach that leads with email before layering in LinkedIn and phone.
What makes Belkins stand out from other outbound marketing agencies is their proprietary email deliverability tool, Folderly.
Most agencies treat deliverability as an afterthought.
Belkins built an entire product around inbox placement, which means their campaigns are structurally more likely to reach prospects before getting swallowed by spam filters.
They provide a dedicated team per client that includes researchers, copywriters, and outreach specialists, so you're not sharing bandwidth with 50 other accounts.
The multi-channel approach (email + LinkedIn + calling) compounds well when all three channels are working in coordination.
One thing to note is that Belkins retains control of the sending domains and outbound infrastructure.
If you want to own your outbound stack after the engagement ends, you'll need to clarify that upfront.
- Proprietary Folderly tool for email deliverability — a real competitive edge
- Dedicated team per client — not a shared resource model
- Strong track record across SaaS and B2B services
- Manual prospect research, not recycled list blasting
- Belkins retains control of sending infrastructure — limited portability
- Pricing can be high relative to output volume for smaller budgets
- Phone and multi-channel orchestration is less emphasised than email
8. Operatix
Operatix, now part of memoryBlue after a strategic merger, is one of the top outbound sales agencies for B2B software vendors targeting global enterprise buyers.
They field 300+ SDRs across North America, EMEA, LATAM, and APAC, and run campaigns in 17 languages, which is rare among outbound marketing agencies at this level.
Their model is built for long, complex sales cycles with multiple stakeholders.
Enterprise tech deals don't close from a single cold email sequence, and Operatix understands that.
They support outbound prospecting, inbound lead qualification, marketing acceleration, and channel partner development, covering more of the sales development function than most agencies.
The EMEA coverage is a genuine differentiator. If you're a B2B SaaS company trying to break into European markets, Operatix has the regional knowledge and the language coverage to execute.
- Global SDR coverage in 17 languages across 4 regions
- Strong enterprise tech and SaaS vertical depth
- Performance-based pricing option reduces risk for new clients
- Supports channel partner development alongside direct outbound
- Custom pricing with no public benchmarks — requires a discovery call
- Not built for SMBs or companies with modest pipeline targets
- Heavy model — can be overkill for focused, single-market campaigns
9. SalesCaptain
SalesCaptain focuses on predictable B2B pipeline growth through multi-channel outbound campaigns run across email, LinkedIn, and sales automation tools.
Their model focuses on consistency and repeatability. They build outbound systems designed for steady, measurable output rather than spikes.
For companies that already understand their market and just need consistent execution, SalesCaptain's structured approach works well.
They're a solid choice if you want visibility into how outbound activity maps to revenue, not just meeting counts.
They're not the most innovative outbound marketing agency on this list, but reliability has its own value.
If you've been burned by agencies that over-promised and under-executed, their execution-first model is a reasonable counter.
- Strong emphasis on consistency and repeatability
- Multi-channel coverage across email and LinkedIn
- Good for teams that want structure and process over flashy tactics
- Solid reporting and pipeline visibility
- Less emphasis on creative, differentiated messaging strategies
- Not the right fit if you need to figure out positioning and ICP alongside execution
- Custom pricing with limited public information on benchmarks
10. Revboss
Revboss is one of the few top outbound marketing agencies with a starting price point accessible to smaller B2B teams.
Starting at $2,500/month, they serve marketing agencies, SaaS companies, and B2B service firms that want cold email outreach without paying enterprise-tier retainers.
Their model leans on automation and software like AI-driven sequencing, automated follow-ups, and platform-level efficiency that lets them run campaigns at lower cost than human-heavy models.
This makes them a strong pick for companies that have a clear ICP, tight messaging, and just need the machine running.
Revboss holds a 4.6/5 on G2.
Some users have flagged inconsistencies in lead quality, so setting strong ICP parameters upfront is important to get the most out of their system.
- Accessible entry pricing for smaller teams
- Software-first automation keeps costs manageable
- Pilot program available before committing to a longer contract
- Good for teams that want outbound running without a large headcount
- Lead quality can vary — requires strong ICP definition upfront
- Less suited for enterprise accounts or complex sales cycles
- Not a full multi-channel solution — primarily email and ads
What to Look For in a Top Outbound Sales Agency
Before you sign a contract, these are the six things worth scrutinizing.
Any agency that can't answer clearly on these is a red flag.
1. ICP clarity and targeting depth
The best outbound sales agencies don't just blast lists.
They build tightly defined ideal customer profiles, enrich the data, and personalize outreach based on real signals like industry, company size, tech stack, and intent data.
If an agency starts with "how many contacts do you want per month?" before understanding your ICP, walk away.
2. Channel coverage
Cold email alone is not an outbound strategy.
The top outbound marketing agencies run coordinated, multi-channel campaigns across email, LinkedIn, and phone.
The compounding effect of touching a prospect across multiple channels is where the real pipeline comes from.
3. Copywriting quality
Templates kill campaigns.
Ask to see sample sequences.
If the messaging is generic, vague, or full of "I wanted to reach out because..." openers, the deliverability might be fine, but the reply rates will be awful.
4. Deliverability infrastructure
Outbound only works if emails land in inboxes.
Ask how they manage domain warm-up, sending volume, and bounce rates. Agencies that skip this conversation are the ones that burn your domains within 30 days.
5. Reporting and transparency
You should be able to see open rates, reply rates, positive response rates, and booked meetings broken down by sequence and audience segment. Real-time dashboards beat weekly slide decks.
6. Contract flexibility
Long-term lock-ins before proven results are a sign the agency needs time to run before you can evaluate whether it's working.
The best outbound agencies are confident enough in their execution to offer short pilots or month-to-month options.
FAQs Related to Best Outbound Marketing Companies
What do outbound marketing agencies do?
Outbound marketing agencies help B2B companies generate pipeline by proactively reaching out to potential buyers, rather than waiting for leads to come through inbound channels. They typically handle ICP research, prospect list building, cold email copywriting, LinkedIn outreach, appointment setting, and campaign optimization.
How much does an outbound sales agency cost?
Outbound sales agencies typically charge between $2,500 and $15,000 per month, depending on the scope of services, channel coverage, and team size. Budget-friendly options like Revboss start at $2,500/month, mid-tier agencies like Martal Group and Belkins run $3,600–$8,000/month, and enterprise-focused agencies like CIENCE and Callbox can reach $10,000–$15,000/month. Some agencies also offer performance-based or pay-per-meeting models.
Is outbound marketing still effective in 2026?
Yes, outbound marketing is still one of the fastest ways to build a B2B pipeline when it's done with precision. The spray-and-pray approach is dead, but targeted, multi-channel outbound that leads with relevant messaging and real personalization still produces strong results.
What's the difference between outbound and inbound agencies?
Inbound agencies build systems that attract buyers over time, like SEO, content, social media, and paid ads that pull people toward your brand. Outbound agencies go directly to your target buyers and start conversations before those buyers are actively searching. Inbound is slower but compounds.
Final Words
There's no shortage of outbound marketing agencies claiming they'll fill your calendar with qualified meetings.
The ones that actually deliver build systems around your ICP, own the execution from list to reply, and give you real visibility into what's working.
If you want to skip the trial-and-error and work with a team that has the track record to back it up, UltraGrowthMedia's outbound service is worth a serious look.
We've generated $10M+ in revenue for clients (last year alone) across 12+ countries.
We do not have any long-term contracts, and we also provide transparent reporting from day one.
