Stone Haven vs Alternatives
How a fully-managed outbound engine compares to the other ways B2B teams build pipeline - named agencies, outsourced SDRs, and in-house builds. Every breakdown is backed by Stone Haven's own published deliverability numbers.
| Metric | Stone Haven | Belkins | CIENCE | Martal Group | SalesHive | Cleverly | Callbox | Leadium |
|---|---|---|---|---|---|---|---|---|
| Core model | Booked, qualified calls | Appointment setting at scale | Managed GTM + SDR marketplace | Fractional SDR retainer | Productised SDR on own platform | LinkedIn-led lead gen | Monthly campaign pod | Managed appointment setting |
| Published pricing | Quoted on a call | Packages listed, no rates | $2,000/mo + $499/mo platform | Three tiers, no rates | Three flat tiers, rates on a call | — | $15k-$30k/mo per pod | Quote only |
| Setup fee | Scoped to the program | — | $5,000 one-time | — | None | — | Not published | Not published |
| Minimum commitment | Program-scoped | — | Month to month | 3-4 month pilot | Month to month | — | A few months | Month to month |
| Primary channel | Email-first, calls and DM layered | Email, LinkedIn, calling | Email, phone, digital | Email, LinkedIn, calls | Calling-led, email layered | LinkedIn-led | Phone-first multi-channel | Email-led multi-channel |
| Sending infrastructure | 25-120 isolated domains, 200-610 inboxes | Not published | Not published | Not published | Not published | Builds and manages it | One bullet, no detail | Custom domains, DKIM/SPF/DMARC, warm-up |
| Dedicated reps | Managed program team | — | SDRs via marketplace | 200+ onshore executives | US-based SDRs | — | Pod: SDR, manager, strategist | US-based SDR team |
| Monthly send capacity | Up to 250,000/mo | — | — | 9,000-12,000/mo | — | — | Not published | Not published |
| Deliverability data published | 98% inbox placement; 0.97% bounce across 231,347 sends | None; 32.92% engagement across 55,515 delivered | None denominated | Not published | Not published | None denominated | Bare rates, no denominators | Reporting stack only |
| Terms visible before a sales call | No rates published | Package structures | Itemized rates and terms | Tier structure | Tiers, no setup fee, month to month | — | $15k-$30k/mo estimator | Terms, but no rates |
Rival cells are quoted from each vendor's own published pages as of July 2026; a dash means the figure is not published. Stone Haven's numbers come from its own campaign reporting, with send counts attached.
Read the full breakdown for each
Comparison
memoryBlue: Why Teams Choose StoneHaven for Speed to Pipeline
memoryBlue recruits and trains outsourced SDR teams. StoneHaven's warmed infrastructure books calls from the first send, with 445 sales calls in 25 days. Full comparison.
Comparison
Cleverly Alternative: Cold Email Out-Produced LinkedIn DM 8x Time-Adjusted
A 100,000-touch-per-channel study found cold email out-produced cold DM roughly 8x and cold calling roughly 40-50x on a time-adjusted basis, delivering its result in one day of sending against two months for DM and a full year for calling.
Comparison
SalesHive Alternative: 532 Booked Calls in One Month
StoneHaven booked 532 sales calls in a single month, adding $379,000 in MRR, at up to 250,000 emails a month per program. Full SalesHive comparison.
Comparison
Martal Group Alternative: 445 Booked Calls in 25 Days
StoneHaven's own engine booked 445 sales calls in 25 days and 532 in a month adding $379,000 MRR. Martal sells a fractional SDR retainer with a 3-4 month pilot.
Comparison
CIENCE Alternative: 445 Booked Calls in 25 Days | StoneHaven
StoneHaven's own engine booked 445 sales calls in 25 days and 532 calls in a month adding $379,000 in MRR. That holds because bounce stays at 0.97% across 231,347 sends.
Comparison
Best Appointment Setting Companies 2026: Booked Meetings, Audited
532 booked calls in one month and $379,000 in added MRR. Eight appointment setting companies ranked on the meetings they produce and the volume behind them.
Comparison
Best Cold Email Agencies for AI Companies: Ranked on Booked Meetings
Ranked on results. StoneHaven's published B2B SaaS program took booked meetings from 3-4 a month to 72 and reply rate from 1.1% to 2.5% at 120,000 sends a month.
Comparison
Best Cold Email Agencies for B2B SaaS 2026: Ranked on New ARR
Ranked on results. $1M+ in new ARR and 432 qualified meetings in six months, with the full conversion chain published, then eight agencies measured against it.
Comparison
Best Cold Email Agencies 2026: Ranked by Booked Meetings and Pipeline
Eight cold email agencies compared on booked meetings, pipeline and deal size. StoneHaven's published programs booked 532 calls in one month and $38M+ in tracked pipeline.
Comparison
Belkins vs CIENCE vs Martal vs StoneHaven: Which Books More Pipeline
532 calls booked in a month and $379,000 in new MRR. StoneHaven, Belkins, CIENCE and Martal compared on booked meetings, pipeline and volume, with every number sourced.
Comparison
Outsourced SDR vs In-House: The Cost Line Everyone Gets Wrong
Outsourced SDR runs $3,000-$14,000/mo vs $125K-$162K/yr in-house. The real cost line is isolated sending infrastructure. StoneHaven booked 445 calls in 25 days.
Comparison
Cold Email Agency: What You're Actually Buying (and the 4 Numbers to Demand)
Most cold email agency pitches hide the only metrics that matter. StoneHaven publishes 98% inbox placement and sub-1% bounce at 100,000+ sends a month. Here are the 4 numbers to demand.
Comparison
Belkins Alternative: The Only B2B Outbound Agency That Publishes Its Deliverability Numbers
Belkins runs multi-channel appointment setting and does not publish inbox-placement or bounce data. StoneHaven held 98% inbox placement and 2.82% bounce across 183,524 sends. Full comparison.