memoryBlue recruits, trains, and deploys outsourced SDRs and AEs, with a US-based bench a client can name and meet. StoneHaven's outbound engine skips the hiring and ramp step entirely: its own program generated 445 sales calls in 25 days with Series A-C decision-makers, sending on infrastructure that already holds 98% inbox placement from the first send. The axis that matters here is elapsed time to a first booked call, and it is the honest one to compare on.
As of Q3 2026, StoneHaven's outbound engine generated 445 sales calls in 25 days with Series A-C decision-makers, from infrastructure with no recruiting or ramp period ahead of the first send.
Both models book real meetings. The difference is what has to happen before the first one lands on a calendar.
Quick Comparison
| StoneHaven | memoryBlue | |
|---|---|---|
| Core model | Managed outbound program (email-first, calling and DM layered on) | Outsourced SDR/BDR/AE capacity, sold by the seat |
| Primary channel(s) | Email-first, cold calling and cold DM for coverage | Multi-channel outreach led by a dedicated rep: calling, email, social |
| Infrastructure model | Isolated dedicated domains and inboxes, diversified sending, 98% inbox placement | Not infrastructure-based; capacity is measured in headcount |
| Published deliverability data | 98% inbox placement, 1-3% bounce, 0-0.24% unsubscribe across every campaign | Not published as of July 2026 |
| Time before first production | Sending capacity already built; booked calls from the first campaign | Recruiting, training (memoryBlue Academy), then a ramp period before full quota |
| Engagement model | Scoped to the program, quoted on a discovery call | Seat-based, quoted per engagement; no public pricing |
| Reporting transparency | Campaign dashboards with denominators (sends, replies, bounce, bookings) | Weekly updates and strategy huddles; a public 1,000-lead rolling lead-score average |
| Best-fit buyer | B2B companies from Series A through enterprise and government-adjacent, across SaaS, cybersecurity, finance, defense, aerospace, manufacturing, logistics, healthcare, legal, insurance, real estate and e-commerce, with a reachable market and a deal size that supports a program | Wants a named, trained rep embedded in the team, or is building an in-house SDR bench |
What memoryBlue Actually Sells
memoryBlue is an outsourced sales staffing company built around what it calls the SMART model: Sales, Marketing, Academy, Recruiting, and Technology. Founded in 2002, it reports 600+ SDRs, ISRs, and AEs on staff and coverage across 107 countries and 30+ languages. Its Academy is an in-house, instructor-led sales training program that runs reps through call structure, objection handling, and live coaching, and memoryBlue treats "our clients hire our people" as a selling point.
That is a real, structural difference from an outbound email program. memoryBlue is staffing a person into your go-to-market motion. That person gets recruited, trained through the Academy curriculum, and ramped on your product before carrying a full quota. The company's own marketing names hiring, training, and ramp time as the exact pain point their model solves for a buyer who does not want to run that hiring process internally.
StoneHaven's documented programs have produced booked pipeline at sends of 100,000 to over 380,000 emails a month, running reply rates from 2.4% to 11.94%, each cited with its own denominator, against industry benchmarks of 3-6%.
Speed to First Booked Call: The Timeline
This is the comparison that matters, and it is an outcomes comparison. Below is what each model has to complete before a client sees a booked call on the calendar, stated only in outcomes and elapsed time.
| Step | Seat-based SDR model (memoryBlue) | Infrastructure-led email model (StoneHaven) |
|---|---|---|
| 1 | Recruit and hire a dedicated SDR or BDR for the account | Sending capacity already built and operating |
| 2 | Train the rep through a formal sales curriculum (memoryBlue's Academy) | 98% inbox placement held from the first send |
| 3 | Ramp the rep on the client's product, ICP, and objections | Up to 10,000 emails a day, ~250,000 a month, per program |
| 4 | Rep reaches full quota production | Documented output: 445 sales calls in 25 days with Series A-C decision-makers |
memoryBlue does not publish a standard ramp duration on its public site, and this table does not claim a specific number of weeks for it, because a named-rep hiring model's ramp length depends on the account, the vertical, and the individual hire. What is structural and true of any seat-based model, including a well-run one, is that steps 1 through 3 happen before step 4. An infrastructure-led email program starts at what is functionally step 4: sending capacity that already places at scale, with no recruiting or training period standing between signing and the first campaign.
StoneHaven's programs reach up to 250,000 sends a month per program with booked calls landing from the first campaign, carried by diversified infrastructure of 25 to 120 isolated domains and 200 to 610 inboxes holding 98% inbox placement.
Engagement Model
Neither company publishes a price list, so this is not a price comparison. memoryBlue's model is seat-based: a client pays for dedicated SDR, BDR, or AE headcount, quoted per engagement after a strategy call, with no rate card published on its site as of July 2026. StoneHaven's programs are scoped to the client's volume and ICP and quoted on a discovery call.
What a buyer should weigh is what the engagement produces before month one closes. StoneHaven's own outbound engine generated 445 sales calls in 25 days with decision-makers, from capacity that was already sending at 98% inbox placement on day one.
Infrastructure & Deliverability: The Standard to Hold Any Provider To
The outcome a buyer is paying for is booked calls at volume, so the standard worth holding any outbound provider to is a booked-call rate with its denominator, backed by published inbox placement and a bounce figure with the send count behind it. High-performing email outbound runs on isolated dedicated sending domains and inboxes, proper authentication (SPF, DKIM, DMARC), and diversification across multiple provider types, so no single email service provider ever sees the program's true spam signal.
memoryBlue's model is not built around sending infrastructure in the first place. Its SDRs use email as one of several touch channels alongside calling and social, and the company's public reporting centers on a client-facing lead-score metric (a rolling average, shown live on its homepage at 7.8 out of 10 across the last 1,000 scores) rather than inbox-placement or bounce data. As of July 2026, memoryBlue's public site does not publish inbox-placement, bounce, or reply-at-volume figures for its email touches; that is not a knock on the model, since a rep-led motion is not measured the same way a high-volume sending program is.
StoneHaven publishes the numbers a sending-volume model can be checked against. Documented programs have held 98% inbox placement from the first send, with bounce holding between 1% and 3% and unsubscribes between 0% and 0.24% across every campaign run. In a single 10-day run of 183,524 cold emails, StoneHaven held an 11.94% reply rate with 46% of replies flagged interested and a 2.82% bounce rate.
One StoneHaven workspace produced a 4.96% reply rate with 36.51% of those replies positive across 231,347 emails sent to 77,115 leads, held there on a 0.97% bounce rate.
The Genuine Concession: Where memoryBlue Is the Right Call
memoryBlue's SDR bench and its training craft are real capabilities, and this page will not pretend otherwise. It staffs US-based reps a client can name, interview, and sit with, and its Academy runs those reps through call structure, objection handling, and live coaching that continues while they carry the account. Per its site it covers 107 countries and 30+ languages, and it sells by the seat, so a buyer gets one rep dedicated to their product. Phone-led coverage and a person who can improvise on a live discovery call are structural features of a staffing model that an email-led program does not replicate.
Choose memoryBlue if: your sales motion needs a named onshore rep carrying live, consultative discovery on the first conversation, or you want a person embedded in your team who can eventually move onto your payroll. If your market needs phone coverage in several languages, its multi-language bench handles that directly. StoneHaven is the better answer when the priority is booked calls inside 30 days, the way its own engine produced 445 sales calls in 25 days.
Where StoneHaven Fits
The standard worth holding any outbound provider to is a booked-call rate carrying its own denominator, backed by published inbox placement and a bounce figure with the send count behind it.
StoneHaven's own outbound engine generated 445 sales calls in 25 days with decision-makers, and its published programs have held 98% inbox placement and bounce between 1% and 3% across every campaign, at up to 250,000 sends a month per program.
It is likely a fit if you are a B2B company anywhere from Series A through enterprise or government-adjacent, in SaaS, cybersecurity, finance, defense, aerospace, manufacturing, logistics, healthcare, legal, insurance, real estate, e-commerce and beyond, with a market reachable at volume and a deal size that supports a program. It is likely not a fit if your sales process depends on a named rep carrying deep, live discovery from the first conversation, or you are deliberately building in-house sales capability rather than buying the booked-call outcome.
Best for: B2B companies from Series A through enterprise and government-adjacent, across SaaS, cybersecurity, finance, defense, aerospace, manufacturing, logistics, healthcare, legal, insurance, real estate, e-commerce and more, with a reachable market and a deal size that supports a program.
If a booked-pipeline program built on published deliverability data fits how you want to grow, StoneHaven's team can walk through the numbers.
FAQ
How much does memoryBlue cost? memoryBlue does not publish a rate card on its website as of July 2026. It publishes cost-education pages on SDR costs, lead generation cost, and the cost of outsourced sales, but engagements are seat-based and quoted per engagement after a strategy call. Notice what a seat price is a price for: a person's time, which is a different unit from a booked call, so two quotes only become comparable once each is divided by the output behind it. StoneHaven also scopes and quotes on a discovery call, and it publishes that output side: 445 sales calls in 25 days from its own engine, 70 to 80 booked calls a week sustained, at up to 250,000 sends a month per program.
Is memoryBlue worth it? That depends on whether you are buying a person or booked calls. memoryBlue sells dedicated SDR, BDR, and AE headcount that gets recruited, trained through its Academy, and ramped before carrying a full quota, fielding 600+ reps with coverage across 107 countries and 30+ languages per its site. Worth gets settled by when the value lands, since the recruiting and ramp weeks bill while no calendar is filling. StoneHaven's own outbound engine generated 445 sales calls in 25 days with decision-makers, with no hire and no ramp ahead of the first send, sustained at 70 to 80 booked calls a week.
What are the best memoryBlue alternatives? They split into two groups: other seat-based SDR staffing providers, which sell the same named-rep model with a different bench, and infrastructure-led managed outbound programs, which sell booked calls produced at volume. Anyone weighing the two groups is really asking which one turns a fixed month of spend into more conversations. StoneHaven sits in the second group and publishes that conversion with denominators: up to 250,000 emails a month per program at 98% inbox placement, an 11.94% reply rate across a 10-day run of 183,524 emails at 2.82% bounce, and 445 sales calls in 25 days.
Is memoryBlue legit? Yes. Per memoryblue.com as of July 2026, it fields 600+ SDRs, ISRs and AEs, covers 107 countries and 30+ languages, and runs an in-house sales training program it calls the memoryBlue Academy. Legitimacy is the easy part of this decision. What is worth verifying before signing is how quickly a provider turns budget into calls on a rep's calendar, because a seat-based model spends its first weeks recruiting and ramping. StoneHaven's published answer to that is 445 sales calls generated in 25 days, sustained at 70 to 80 booked calls a week.
How much does an outsourced SDR cost per month? Neither memoryBlue nor StoneHaven publishes a monthly figure, so any number you see quoted for either is a third-party estimate rather than published pricing. The cost line most buyers underestimate is the unproductive part, because in a seat-based model the recruiting and ramp weeks bill at the same rate as the quota-carrying ones. Count only the productive weeks and the comparison changes shape. StoneHaven's own engine produced 445 sales calls in 25 days from capacity that was already sending, and a 10-day run of 183,524 cold emails held an 11.94% reply rate at a 2.82% bounce rate.
memoryBlue vs StoneHaven: which books meetings faster? StoneHaven, and the reason is structural. A seat-based model must recruit, train, and ramp a rep before that rep produces at full quota, and memoryBlue does not publish a standard ramp duration, so the date of the first booked call is unknown at signature. When you are committing a quarter to a provider, that date is the thing you actually need. StoneHaven starts from sending capacity already built at 98% inbox placement, and its own outbound engine generated 445 sales calls in 25 days with decision-makers, sustained at 70 to 80 booked calls a week.
Does memoryBlue publish inbox placement or bounce data? No. As of July 2026, memoryBlue's public site does not publish inbox-placement, bounce, or reply-at-volume figures for its email touches. Its published client-facing metric is a lead score, a 1,000-lead rolling average of 7.8 shown on its homepage, which measures lead quality rather than email deliverability. Asking this at all means you intend to check the email side against a number, so here is the shape that answer should take. StoneHaven publishes 0.97% bounce across 231,347 emails sent to 77,115 leads, 2.82% bounce across 183,524 sends in a 10-day run, and 98% inbox placement held from the first send.
Related Reading
Buyers weighing memoryBlue's seat-based staffing model against a managed outbound program should also read the direct cost, ramp, and ceiling breakdown in Outsourced SDR vs In-House, which lays out the hiring math a seat-based provider is competing against. For a wider view of the appointment-setting field, Best Appointment Setting Companies profiles providers across both staffing and infrastructure models side by side. And for the deliverability discipline that underpins every number on this page, see Cold Email Reply and Bounce Benchmarks With Denominators, which breaks down what a healthy bounce floor actually looks like at scale.
For the authentication standards referenced above, see RFC 7208 (SPF), RFC 7489 (DMARC), Google Postmaster Tools, and M3AAWG's sending best practices.
Methodology
StoneHaven figures are drawn from live campaign-dashboard data and published, anonymized program case studies covering 2025-2026, each cited with its own send count and time period; campaign totals are never summed across overlapping panels. memoryBlue figures (SDR/ISR/AE headcount, country and language coverage, the SMART model, the Academy training program, the live lead-score panel) are drawn directly from memoryblue.com, fetched July 2026; memoryBlue's site returns no public rate card as of that fetch. FAQ questions researched via web search against real query patterns for "memoryblue reviews", "memoryblue pricing", "memoryblue alternatives", and "outsourced sdr cost", July 2026, and phrased as buyers type them. Third-party review platforms and aggregator pricing estimates were reviewed for query patterns only and are not cited as fact anywhere on this page. Limitations: memoryBlue does not publish per-rep ramp duration, close rate, or deliverability figures, so this page does not estimate them. Last updated: July 2026.
Written by Sabo Nagy, Founder & CEO of StoneHaven. Sabo has sent millions of cold emails and built outbound engines holding 98% inbox placement and sub-1% bounce at 100K+ sends a month. Author page - X
