Outbound sales is how most B2B companies fill the top of their pipeline: researching the right accounts, reaching the right person, and turning a cold reply into a real meeting. Belkins, memoryBlue, and Outbound Sales Pro all sell that work as an outsourced function, though each one runs it differently enough to matter.
If you’re comparing any two of these three, or all three at once, this article is built for that exact search.
This guide lines up Belkins vs memoryBlue vs OSP on model, price, and contract risk, with a side-by-side table, honest pricing estimates, a week-by-week onboarding look, and a recommendation matched to your buyer type. Whether you’re weighing Belkins vs memoryBlue, Belkins vs Outbound Sales Pro, or memoryBlue vs Outbound Sales Pro, you’ll walk away knowing which of these outsourced SDR companies actually fits your team.
Key Takeaways
- Outbound Sales Pro, Belkins, and memoryBlue differ in contract length and price: Third-party sources commonly cite 3 to 6 months for Belkins and 6 to 12 months for memoryBlue, while OSP starts at $11,999 a month for an initial 6-month engagement with no annual lock-in beyond that.
- memoryBlue’s model is built to train and place reps who then run your campaign, which changes what you are actually paying for: Its own Academy trains recruited reps who then run your campaign, and you can hire a standout rep onto your own team later instead of keeping every rep on memoryBlue’s roster.
- The real differentiator across all three vendors is how each one defines and reports a qualified, held meeting versus a raw booking: Accepted and held meetings vs vanity meeting volume is the question that actually decides your outsourced SDR pricing 2026 return, more than the sticker price on the contract.
Which Model Actually Fits Your Team?
A quick call can map your ICP and budget against all three operating models before you commit to any single vendor.
Belkins: The Standardized Appointment Setting Agency Built for Scale
Belkins now employs somewhere between 201 and 500 people, spread across offices on more than one continent, a sign of how far the B2B appointment setting agency and B2B lead generation agency has scaled since its 2017 founding. Research happens by hand here: manual lead research, ICP and TAM mapping, and an email deliverability setup the agency built and runs itself, all feeding outreach across email, LinkedIn, and both cold and intent-based calling.
Client feedback runs into the hundreds between G2 and Clutch, which explains why the Belkins name turns up in nearly any search for Belkins alternatives or Belkins competitors. The agency fits best with mid-market to enterprise companies already running an established product on a longer sales cycle, most of them based in North America or Western Europe. If you want the fuller picture before this three-way comparison continues, our own Belkins review has more background.
memoryBlue: The Audition-to-Hire Model for Sales Development Outsourcing
MemoryBlue is a sales development outsourcing consultancy founded in 2002, built around what it calls an audition-to-hire model. Reps are recruited, trained through memoryBlue’s own Academy, and then run live SDR campaigns for clients, with the explicit option for you to hire a standout rep onto your own team later instead of keeping them on memoryBlue’s roster.
Its 2023 acquisition of Operatix expanded its scale and its footprint across Europe, positioning the combined company as a global sales acceleration provider for the B2B technology ecosystem. Its client base skews toward VC-backed and enterprise tech companies, including cybersecurity, where deep product knowledge and a longer-term talent pipeline matter as much as raw meeting volume, which is worth knowing before you search for memoryBlue alternatives or competitors in this space. For a closer two-way look at pricing and use cases, see our full Outbound Sales Pro vs memoryBlue comparison.
Outbound Sales Pro: A Dedicated SDR Team Built Around Accepted Meetings
For companies that already run their own closing team, Outbound Sales Pro exists to solve one specific bottleneck: not enough qualified conversations reaching those closers each week. Coverage comes from one exclusive, US-based team of at least two SDRs assigned only to your account, priced from $11,999 a month across an initial 6-month engagement built around your ICP and a mutually agreed meeting target.
Pricing here isn’t tied to a volume tier or a per-appointment fee, so the SDR-as-a-service program has no incentive to chase quantity over fit. Every accepted meeting gets handed to your team once it clears an agreed qualification bar, and a weekly report tracks reply quality, conversation-to-meeting rate, held rate, and cost per meeting, so accepted and held meetings vs vanity meeting volume stays visible rather than assumed. The company’s G2 page currently shows a 5.0 rating.
Belkins vs memoryBlue vs OSP at a Glance: The 2026 Comparison Table
|
Dimension |
Belkins |
memoryBlue |
Outbound Sales Pro |
|
Model |
Large-scale, standardized appointment-setting agency |
Audition-to-hire sales development consultancy |
Dedicated, US-based SDR team on a retainer |
|
Pricing band (estimated) |
~5,000–14,800+/mo (third-party estimates; not published) |
~7,000–16,000/mo, or ~800–1,000 per appointment pay-per-meeting (dedicated resource ~$11,000/mo per memoryBlue’s own site) |
Starts at $11,999/mo for an initial 6-month engagement; no pay-per-meeting incentive |
|
Contract length |
Commonly cited 3–6 month minimum |
Commonly cited ~6 months, sometimes up to 12 |
Initial 6-month engagement; no annual lock-in beyond that |
|
Team structure |
Dedicated account manager + SDR pod, large shared bench |
Recruited-and-trained rep pod with an eventual hire-away option |
Dedicated, US-based SDR team (at least 2 SDRs per account) |
|
Meeting definition |
Contractual meeting-count guarantee; buyer defines qualification |
Fixed-fee, pay-per-appointment, or hybrid pricing |
Held, qualified meetings reported weekly against an agreed standard |
|
Reviews |
5.0/5 on G2 |
||
|
Best fit |
Established B2B companies wanting a large, standardized operation |
Enterprise/VC-backed tech companies wanting a trained, hireable talent pipeline |
Growing in-house sales teams wanting flexibility and held-meeting accountability |
Belkins and memoryBlue do not publish pricing or contract-length terms directly, so their figures above reflect third-party estimates and reviews rather than a confirmed rate card. OSP’s starting price is quoted directly, though your final scope still gets set at the proposal stage.
SDR Outsourcing Contract Terms: Services, Channels, Team Structure & Minimum Commitments Compared
Each vendor bundles a different range of services under its retainer, and that range matters as much as the price tag. Belkins pairs appointment setting with lead generation and optional ABM or CRM consulting. memoryBlue pairs SDR delivery with recruiting and Academy training through its own framework, while OSP centers on appointment setting and SDR-as-a-service with multi-channel outbound and market validation support.
|
Factor |
Belkins |
memoryBlue |
Outbound Sales Pro |
|
Services offered |
Appointment setting, B2B lead generation, ABM (add-on), CRM consulting |
SDR/BDR outsourcing, sales recruiting & Academy training, marketing support, tech integration |
Appointment setting, SDR-as-a-service, multi-channel outbound, market validation |
|
Outreach channels |
Email, LinkedIn, cold & intent-based calling, ABM (add-on) |
Calling and email-led, with a training and recruiting layer |
Email, calling, LinkedIn, in-house deliverability infrastructure |
|
Team structure |
Dedicated account manager + SDR pod, large shared bench |
Recruited-and-trained rep pod, hire-away path available |
Dedicated, US-based SDR team (at least 2 SDRs) |
|
Onboarding timeline |
~2 weeks to launch per marketing pages; 4–6 weeks to full implementation per third-party reviews |
Onboarding scoped per engagement, described as more program than fast plug-in |
Structured alignment before full ramp within the initial 6-month engagement |
|
Contract minimum |
Commonly cited 3–6 months (directional estimate) |
Commonly cited ~6 months, sometimes up to 12 (directional estimate) |
Initial 6-month engagement, starting at $11,999/month; no annual lock-in beyond that |
|
Pricing structure |
Volume-tiered retainer |
Fixed-fee, pay-per-appointment, or hybrid |
Starts at $11,999/month for the initial 6-month engagement, scoped to ICP complexity |
|
Meeting guarantee |
Contractual meeting-count guarantee; buyer defines qualification |
Varies by contract type |
Held, qualified meetings tracked against an agreed definition |
Outreach Channels
Belkins runs email, LinkedIn, and cold or intent-based calling, with ABM available as an add-on. MemoryBlue leans on a calling-and-email-led model layered with its Academy training pipeline, since new reps need to learn your product before they can sell it well. OSP runs a multi-channel mix of email, calling, and LinkedIn through its own in-house deliverability infrastructure.
Team Structure
At Belkins, an account manager and an SDR pod work your program, drawing support from a much larger bench of shared talent behind the scenes. MemoryBlue takes a different route, assigning a rep pod it recruited and trained itself, with a standing option for you to take a strong performer onto your own payroll. OSP goes smaller still: one dedicated US-based team stays with your account for the life of the engagement, so nobody new is learning your product halfway through.
Contract Minimums
A true month-to-month vs multi-month contract choice isn’t really on the table with any of the three, since each requires some minimum term before you can exit.
For Belkins, that figure lands around 3 to 6 months according to outside sources. For memoryBlue, estimates run closer to 6 months and occasionally stretch to 12. Since neither vendor puts a number on its own website, read both as a minimum contract commitment ballpark rather than something you can hold them to.
OSP’s initial 6-month engagement starts at $11,999 a month with no annual lock-in beyond that. That structure gives you a defined SDR outsourcing cost and a clear end point instead of an evergreen annual contract.
Meeting Guarantees and Reporting
Belkins’ commitment centers on a meeting count, with the qualification criteria for that count written into your own agreement rather than set by Belkins. How memoryBlue reports back depends on which pricing structure you picked, whether that’s fixed-fee, pay-per-appointment, or a blend of the two.
Meanwhile, OSP applies one consistent held-and-qualified bar to every meeting and publishes the results every week. That weekly OSP report is also a good moment to nail down who owns the data in an outsourced SDR engagement before anything gets signed. Our own Outbound Agency Reporting KPIs guide breaks down what a trustworthy report should look like no matter which vendor sends it.
Rented Capacity, Audition-to-Hire, or Dedicated Retainer: Three Outsourced SDR Models Explained
Belkins’ model works like rented capacity. You are renting a slice of a large, standardized operation with proven playbooks, which trades some customization for scale and consistency.
MemoryBlue’s model works like audition-to-hire. Reps train through memoryBlue’s internal Academy and run live campaigns for you, with a built-in path to convert a standout performer into your own direct hire, so part of what you pay for is a recruiting and training function alongside meeting generation.
OSP’s model works like a dedicated retainer. One assigned US-based team stays on your account long-term, gets measured against an accepted-and-held meeting standard instead of a raw count, and is built to hand off straight to your own closers rather than to eventually join your headcount.
|
Structural Question |
Belkins (Rented Capacity) |
memoryBlue (Audition-to-Hire) |
OSP (Dedicated Retainer) |
|
What you’re really paying for |
Access to a large, standardized playbook and shared bench |
Trained reps plus an option to convert one to a direct hire |
One dedicated team’s ongoing output, starting at $11,999/month for an initial 6-month term, measured against a held-meeting standard |
|
Who runs your campaign day to day |
An assigned SDR pod within a larger operation |
A recruited-and-trained rep, coached through memoryBlue’s Academy |
A dedicated, US-based team assigned solely to your account |
|
Path over time |
Scale up or down within Belkins’ tiers |
Potential to hire a proven rep directly onto your own team |
Deepening account familiarity across the initial 6-month engagement and beyond |
|
Best structural fit |
Buyers who want a proven, standardized process without building one |
Buyers who want a rep-pipeline as much as a meetings-pipeline |
Buyers who want continuity and direct accountability without a long-term lock-in |
Each structure fits a different kind of buyer in practice. Rented-capacity pricing favors buyers who want proven scale without building their own process, audition-to-hire favors buyers who see the engagement as a talent pipeline as much as a meetings pipeline, and a dedicated retainer favors buyers who want continuity and a tight feedback loop with one team, along with clarity on data and pipeline ownership before they sign.
Get A Model Built Around Your Existing Closers
If you already have account executives ready to take a meeting, see what a dedicated retainer looks like scoped to your own held-meeting target.
How Much Does Belkins, memoryBlue, or OSP Actually Cost? A 2026 Pricing Breakdown
There’s no published rate card for Belkins to point to, so every figure below comes from outside reviews and comparison sources instead of the company itself. Full-service retainers are commonly estimated between $5,000 and $14,800 or more a month, with entry tiers sometimes cited lower, and Belkins’ own pricing page lists volume tiers without disclosing dollar rates.
MemoryBlue’s pricing is also mostly third-party-sourced, though its own site discloses two figures directly. A dedicated-resource engagement is estimated between $7,000 and $16,000 a month, with memoryBlue’s own site citing a dedicated-resource model starting around $11,000 a month. A pay-per-appointment structure runs roughly $800 to $1,000 per appointment instead, with a reported minimum near $5,000 a month for smaller engagements.
Outbound Sales Pro’s pricing starts at $11,999 a month for an initial 6-month engagement, scoped to your ICP complexity, with no pay-per-meeting incentive built in. That means OSP never gets paid more for booking a low-quality meeting, since its fee does not move with volume the way a per-appointment model does.
|
Pricing Component |
Belkins (Estimated) |
memoryBlue (Estimated) |
Outbound Sales Pro |
|
Typical monthly range |
~5,000–14,800+/mo |
~7,000–16,000/mo (dedicated resource ~$11,000/mo per memoryBlue’s own site) |
Starts at $11,999/mo for an initial 6-month engagement |
|
Alternative pricing structure |
Volume-tiered retainer only |
~800–1,000 per appointment (pay-per-meeting option) |
Not offered; no pay-per-meeting incentive |
|
Reported minimum |
Not disclosed |
Reportedly ~$5,000/mo minimum for smaller engagements |
$11,999/month starting price for the initial 6-month engagement |
|
Pricing transparency |
Volume tiers published; exact rates not disclosed |
Custom-quoted; dedicated-resource and per-appointment figures published directly |
Starting price published at $11,999/mo for a 6-month term; final scope still custom |
|
What determines real cost |
Meeting count guaranteed; quality set by buyer-defined criteria |
Varies by fixed-fee, pay-per-appointment, or hybrid structure chosen |
Cost tracked per held, qualified meeting |
Note: Belkins does not publish pricing directly, so its figures above are drawn from third-party reviews and comparison sources. MemoryBlue discloses two figures on its own site, which are used directly above alongside third-party estimates for the wider range. OSP’s $11,999/month starting price is used as provided and should still be confirmed against a current proposal, since final retainer scope stays custom for all three vendors.
Cost per accepted, held meeting is the number that actually separates good value from bad here, well ahead of whatever sits on the invoice. Pick the cheaper option with a loose qualification bar, or a per-appointment fee that pays out regardless of fit, and the math can flip fast: more real spend per genuine opportunity than a pricier retainer holding a strict line on what counts as qualified. Run those numbers yourself using our Cost Per Meeting framework or our broader Outsourced SDR Pricing guide.
From Kickoff to First Booked Meeting: A Week-by-Week Ramp Comparison
Every outsourced SDR provider follows a similar arc: kickoff and ICP definition, list build and infrastructure setup, sequence launch, and your first booked meeting. Where they differ is how long each stage takes and what happens inside it.
Belkins front-loads its onboarding with a sales audit, an addressable market calculation, and buyer-profile work, all before outreach ever goes live, a natural result of running a larger, more standardized operation. Getting a campaign to full implementation this way commonly takes 4 to 6 weeks, according to the reviews that cover this kind of appointment setting agency.
MemoryBlue’s process includes a layer most buyers do not expect from the other two: rep recruiting and Academy training. That layer can extend your SDR ramp time, depending on whether an already-trained rep or a newly recruited one gets assigned to your account.
Outbound Sales Pro compresses this into a tighter alignment window instead. Your dedicated team absorbs your ICP, messaging, and qualification criteria first, and booked meetings start landing on your closers’ calendars from there. Reports arrive weekly starting in week one, so nothing about progress sits hidden for a month at a time.
|
Week |
Belkins |
memoryBlue |
Outbound Sales Pro |
|
Week 1–2 |
Kickoff, sales audit, addressable market calculation, buyer-profile refinement |
Kickoff, ICP alignment, rep assignment or recruiting/training if needed |
Kickoff call, ICP and qualification-criteria alignment, messaging brief |
|
Week 2–4 |
Manual lead research and validation, sequence and messaging setup |
List build, sequence and script setup, rep ramp on product/ICP |
List build, sequence launch, infrastructure and deliverability setup |
|
Week 4–6 |
Campaign launch, initial outreach live across channels |
Outreach live; early replies and bookings begin |
First outreach live; early replies and bookings begin |
|
Week 6–12+ |
Results and optimization typically emerge in this window per third-party reviews |
Meeting volume and quality typically stabilize as rep tenure builds |
Meetings booked and handed directly to your in-house closers, with weekly reporting from week one |
Taking longer to ramp doesn’t by itself signal a problem. Sometimes it just means a more thorough process, or in memoryBlue’s case, a talent-development layer running underneath, so measure that timeline against your own urgency for pipeline when sizing up how long it takes to see results from an outsourced SDR provider.
Belkins, memoryBlue, or Outbound Sales Pro: Which One Fits Your Team?
Picking your next outbound sales agency from Belkins, memoryBlue, and OSP means starting from three questions: what stage is your company at, what can you actually spend, and what does your existing sales structure already cover? If you have not run an in-house vs outsourced SDR cost comparison yet, that calculation is worth doing before you weigh any of the three against each other.
Belkins tends to fit:
- Established B2B companies chasing scale and consistency over a fully custom-built process.
- Buyers with the budget to pay for a proven playbook rather than assemble their own.
- Buyers fine with committing 3 to 6 months to a program that runs across every major channel at once.
- Scale-and-standardization buyers, per the operating models covered above.
MemoryBlue tends to fit:
- Enterprise and VC-backed tech companies, especially in cybersecurity or other complex technical sales.
- Buyers who value memoryBlue’s recruiting-and-training pipeline as much as its booked meetings.
- Buyers comfortable with a longer, roughly 6-to-12-month commitment in exchange for a potential future hire.
- Talent-pipeline buyers who see the engagement as a hiring pipeline as much as a meetings pipeline.
Outbound Sales Pro tends to fit:
- Growing B2B and SaaS companies whose account executives need more qualified meetings on the calendar, not more headcount.
- Buyers who want a defined 6-month engagement starting at $11,999 a month instead of an open-ended annual contract.
- Buyers who want weekly visibility into accepted, held-meeting quality rather than a raw count or a per-appointment fee.
- Teams searching for the best outsourced SDR agency for a growing in-house sales team, or the best outsourced SDR company for SMEs with existing sales reps.
If you are still working out how to choose between outsourced SDR agencies, matching your buying motion to the model behind each vendor, per the previous section, is the fastest way to narrow your shortlist. Talent-pipeline buyers lean toward memoryBlue, scale-and-standardization buyers lean toward Belkins, and buyers who already have closers and just want flexible, accountable top-of-funnel support are the clearest fit for OSP.
Summary
Picking among Belkins, memoryBlue, and Outbound Sales Pro depends on your business needs. Assess your company’s stage, your budget, and how tightly you want to control contract risk, and the right operating model, rented capacity, audition-to-hire, or dedicated retainer tends to become obvious. From there, the vendor pick mostly follows on its own.
You now have three tools you didn’t have before: a table that lines up all three vendors side by side, a pricing breakdown with every estimate marked, and a walkthrough of what onboarding actually looks like week by week. Hold a live Belkins or memoryBlue proposal up against any of this and see how it measures up, or use it to sanity-check a contract you already signed. None of it asks you to take one vendor’s word over another’s.
Companies that already have their own closers and want one dedicated, US-based SDR team, a 6-month engagement starting at $11,999 a month, and a weekly, accepted-meeting report instead of a vague annual promise, that’s the exact shape Outbound Sales Pro is built to fill. A demo walks through how a program like that would get scoped around your ICP, your budget, and the sales team you already have. Bring whatever Belkins or memoryBlue already sent you, and you’ll leave with a proposal you can actually hold next to it.
FAQs About Belkins, memoryBlue, and Outbound Sales Pro
Outbound Sales Pro runs a dedicated-retainer model starting at $11,999 a month for an initial 6-month engagement, with no annual lock-in beyond that and weekly reporting on accepted, held meetings. Belkins runs a larger, standardized operation with a commonly cited 3-to-6-month minimum, while memoryBlue runs an audition-to-hire, train-and-place model with a typical 6-to-12-month commitment. We break down each structure in full above.
Outbound Sales Pro is generally the strongest fit if you already have account executives in place, since its model is built to hand off accepted, qualified meetings to your own closers without requiring a long-term contract beyond its initial 6-month engagement. The article covers this in more depth. Belkins and memoryBlue can technically run a similar handoff too, though both tend to get built out for bigger, full-cycle programs or a longer-term talent goal rather than this specific gap.
MemoryBlue’s pricing is not published directly, but third-party estimates and its own site put a dedicated-resource engagement between $7,000 and $16,000 a month, with memoryBlue’s own site citing a starting figure around $11,000 a month. A pay-per-appointment option runs roughly $800 to $1,000 per appointment. Confirm current numbers directly with memoryBlue before you budget around them.
Third-party sources commonly cite a minimum commitment around 6 months for memoryBlue, sometimes extending to 12 months depending on the engagement. This figure is not published on memoryBlue’s own site, so confirm it directly with memoryBlue before you sign anything. Treat any number you see, including this one, as a starting point for that conversation.
MemoryBlue delivers both. Its reps run live outbound campaigns that generate real B2B leads and meetings, while its audition-to-hire structure also works as a recruiting pipeline for your own team. This dual purpose is a structural difference from Belkins and OSP.
Data and pipeline ownership terms vary by contract, so this should get confirmed before you sign with any of the three vendors. Ask specifically what happens to your CRM records, sequences, and contact data if the engagement ends. A vendor who cannot answer that question clearly is telling you something worth paying attention to.
A held, qualified meeting is one that actually occurs and meets an agreed qualification standard, like the right title, confirmed pain, and some visibility into budget or timeline. A raw booked count can include no-shows or prospects who never should have qualified in the first place, which inflates the number without adding pipeline value. OSP’s weekly reporting is built specifically around the former.
Belkins does not publish its rates, so every figure here comes from third-party reviews and comparison sources. Full-service retainers are commonly estimated between $5,000 and $14,800 or more a month, with entry-level engagements sometimes cited lower. Treat these as a starting point for your own conversation with Belkins rather than a locked-in number.
Whether Belkins or memoryBlue is worth it depends on how much you value scale and a training pipeline against a shorter, more flexible commitment. Belkins earns its keep for buyers with an established product and the budget for a big, proven operation with years of track record behind it. MemoryBlue earns its keep when a future hiring pipeline matters as much as booked meetings, but either way you’re signing up for a longer commitment than OSP’s initial 6-month engagement.
Watch for a vendor that will not define what counts as a qualified meeting in writing, since that is the most common source of dispute later. Also watch for a long-term contract with no performance checkpoint built in, and pricing that only appears after multiple sales calls instead of a clear starting figure. Any outsourced SDR vendor that cannot answer a direct question about contract length, meeting definition, or data ownership deserves a harder look before you sign.
Bring Your Belkins Or memoryBlue Proposal to the Call
We’ll walk through it line by line and show you exactly where a dedicated OSP retainer compares.
