Comparison · 2026
Buy a tool, hire an agency, or build your own?
11x, Artisan, Belkins, CIENCE, an in-house SDR, a GTM engineer, or a custom-built system you own. Six real paths to more pipeline, compared honestly, with sourced numbers for each.
How to read this page: every price, rating, and claim below is tagged to a source in the list at the bottom. Altitude builds custom systems (path six), and we say so plainly where we show up.
Why this comparison doesn't usually get made honestly
Ask which AI SDR tool is best and you get a leaderboard of software. Ask which outbound agency is best and you get a leaderboard of agencies. Almost nobody puts a SaaS tool, a managed agency, an in-house hire, and a custom build on the same page, because most of the pages making these lists sell one of the six paths and have a reason to leave the others out.
Here are all six, with what they actually cost, what they actually lock you into, and what you're left holding after year one.
The six paths, side by side
| Path | Year-1 cost | Contract terms | Time to first pipeline | What you keep |
|---|---|---|---|---|
| SaaS AI SDR toolAiSDR, Artisan, 11x | $3k-$60k+ | Monthly to annual; some require quarterly minimums upfront | Days to weeks | Nothing. Cancel and the workflows go with it. |
| Managed outbound agencyBelkins, CIENCE | $29k-$180k+ | 3-6 month minimums common; CIENCE offers month-to-month | 2-4 weeks onboarding | Nothing. The playbook and sequences stay with the agency. |
| In-house SDR hire | $85k-$120k | Ongoing headcount, plus recruiting and ramp | 3-6 months to reliable output[6] | The person, and what they learn, until they leave. |
| In-house GTM engineer hire | $130k-$240k | Ongoing headcount, senior/specialized hire | Weeks to build, ongoing to maintain | The system, as long as that one person stays. |
| Custom-built system you ownAltitude and similar GTM engineering shops | $2.5k-$60k+ once | One-time build, no seat, no renewal | Typically weeks, scoped to the build | The entire system, as code, permanently. |
Figures for tools and agencies are current list pricing where published, or third-party reported where noted below. In-house cost ranges include salary, OTE, benefits, payroll tax, and standard overhead.[6]
The AI SDR tools, named
Best-reviewed of the pure AI SDR tools. Playbooks are pre-built and configurable, not extensible: no custom signal logic or branching beyond what's exposed in the product.[1]
Reviews split between strong results and complaints of generic, “obviously AI” copy and low-quality qualification. Artisan's own CEO has publicly described the product's early output as having “extremely bad hallucinations.”[2]
In March 2025, TechCrunch reported 11x had listed companies including ZoomInfo and Airtable as customers when they were not; ZoomInfo said it never gave permission and does not use the product, and reported 70 to 80% customer churn against inflated ARR figures. Worth knowing before an annual contract.[3]
The managed agencies, named
Strong third-party ratings. The recurring complaint pattern in independent reviews is contract length: buyers locked into a multi-month minimum before results are clear.[4]
No lock-in like Belkins, and CIENCE runs its own data platform. Best fit for larger TAM, multichannel volume plays rather than a tightly scoped startup ICP.[4]
When each path actually wins
Buy a SaaS tool when you want to test the category cheaply and can tolerate generic output while you learn what works.
Hire a managed agency when you have budget for $5k+/month, need someone else to own execution entirely, and can absorb a multi-month contract if the fit is wrong.
Hire an in-house SDR when outbound is becoming a full-time job and you want the knowledge to compound inside one person on your team.
Hire a GTM engineer when you need someone who can both run outbound and keep building the automation behind it, and you can carry a $130k to $240k senior hire.
Build a custom system when you know roughly what “good” looks like for your ICP already, want to stop paying rent on it, and would rather own the thing outright than depend on a vendor's roadmap or a single hire's tenure.
Full disclosure: this is us
Altitude builds the sixth path. We build custom AI outbound systems, research agents, enrichment, sequencing, the whole pipeline, and hand you the finished thing as code. It's a one-time engagement, not a seat you keep paying for, and there's no dependency on one employee's memory of how it works.
We're not the right call for everyone on this page. If you need results next week with zero setup, a SaaS tool is faster. If you want someone else to fully own execution, an agency is simpler. We're the option for teams who already know their ICP and would rather own the machine than keep renting one.
Common questions
Should I hire an AI outbound agency or build an in-house SDR team?
A managed agency gets you moving in 2 to 4 weeks for $29k to $180k+ a year, but usually with a 3 to 6 month minimum contract and nothing to show for it if you leave. An in-house SDR costs $85k to $120k fully loaded and takes 3 to 6 months to ramp, but the knowledge stays on your team as long as they do.[4][6] Neither path leaves you with an owned system; a custom build is the option that does.
Belkins vs CIENCE vs a smaller AI outbound agency, which is better for a startup?
Belkins (4.8 G2, 4.9 Clutch) and CIENCE (4.2 Clutch) are both well-reviewed, established managed agencies. Belkins requires a 3 to 6 month minimum contract; CIENCE runs month-to-month. For a startup still validating messaging, month-to-month flexibility or a smaller AI-native tool carries less downside than a multi-month commitment.[4]
11x vs Artisan vs hiring an agency to build custom AI outbound?
11x runs $5,000/mo+ on annual terms, but TechCrunch documented fabricated customer claims and 70 to 80% churn in 2025, worth weighing before a yearlong commitment.[3] Artisan is cheaper to start (~$280/mo) but has polarized reviews (4.0 G2) citing generic AI-sounding copy.[2] A custom build costs more upfront but ends in a system you own rather than a subscription you renew.
Buy an AI SDR tool or hire a GTM engineer, what's better for a 20-person B2B company?
A SaaS tool is cheaper ($3k to $60k/year) and faster to start. A GTM engineer costs $130k to $240k in total comp but builds and maintains automation specific to your business.[5] At 20 people, most teams get more out of a scoped custom build (same outcome as a GTM engineer's system, without carrying a full-time senior salary) than either extreme.
Is it worth building a custom AI SDR system instead of just buying AiSDR or Artisan?
If you're still discovering what messaging works, a $250 to $2,500/mo tool like AiSDR is the cheaper way to learn.[1] Once you know your ICP and message, a custom build removes the tool's ceiling (AiSDR's playbooks aren't extensible; Artisan's output quality is inconsistent[1][2]) and stops the monthly bill permanently once it's paid for.
Know your ICP and want to own the machine?
The pricing index breaks down what a custom build costs versus renting, and our free tools show the approach working live.
Sources (retrieved 2026-09-02 unless noted)
- AiSDR pricing and G2 rating (76 reviews): g2.com/products/aisdr/reviews, aisdr.com pricing page.
- Artisan pricing and G2 rating (27 reviews, 4.0/5): g2.com/products/artisan/reviews; CEO hallucination comments widely reported in 2026 press coverage of the product.
- TechCrunch, “a16z and Benchmark backed 11x has been claiming customers it doesn't have” (2025-03-24): techcrunch.com/2025/03/24/a16z-and-benchmark-backed-11x-has-been-claiming-customers-it-doesnt-have. ZoomInfo/Airtable denials and churn figures per the same report.
- Belkins and CIENCE pricing, contract terms, and ratings: Clutch and G2 listing pages for each; Belkins 4.8 G2 / 4.9 Clutch, CIENCE 4.2 Clutch (142 reviews).
- GTM engineer total compensation, 2026: Betts Recruiting and Glassdoor GTM engineer compensation data, $132k to $241k range, median ~$176k.
- Fully loaded SDR cost, 2026: StealthAgents and SalesHive SDR cost breakdowns, $85k to $120k fully loaded (salary, OTE, benefits, payroll tax, tools, overhead), 3 to 6 month ramp.
- Custom build cost tiers and rent-vs-own math: altitudebiz.dev/notes/ai-sdr-pricing-index (Altitude's own pricing index, sourced separately).
Maintained by Altitude, an AI GTM agency. Prices and contract terms change; figures are current as of this publication, so check the vendor before quoting. Spot something outdated? Email amit@altitudebiz.dev and we'll fix it.