Leadium is a boutique B2B SDR agency built around a simple idea: take on a limited number of clients and give each one more attention.
Today, the agency has roughly 60 US-based staff and works with around 30–35 active B2B clients at a time. That allows Leadium to keep delivery highly hands-on, with senior SDRs and closer involvement across campaigns.
And the track record is impressive. Since 2015, Leadium says it has delivered 1,500+ client programs, generated $1B+ in pipeline, and supported companies that went on to raise $6.5B+ and complete five IPOs.
Its reputation backs that up too, with 76 Clutch reviews averaging 5.0 stars.
So, what makes Leadium different, and is its high-touch approach worth the investment?
I dug into its services, pricing, reviews, and results to find out.
The review footprint is large but asymmetric. Clutch holds 76 verified reviews averaging 5.0 stars with a Premier Verified badge and 48 Clutch-independently-verified reviews. G2 shows 4.3 stars with more mixed sentiment. GoodFirms and Inc. 5000 have also recognized Leadium.


Ask for two callable client references in your industry from the last 12 months. If you sell into a specialist vertical, ask specifically whether the SDRs assigned will have prior experience in that industry.
Hire Leadium if you want a founder-led, US-only, boutique SDR partner with month-to-month flexibility, and you can allocate $3,500 to $15,000/month with the trade-off that offshore or pay-per-lead options exist at lower cost.
Two things support this verdict. The boutique model is real. 30 to 35 active clients means the "senior US-based SDR" promise is defensible, not a marketing line. And Kevin Warner's background (founding team at WayUp, MOKO, previous company Leadware acquired by CIENCE) gives Leadium legitimate operational credibility that newer agencies lack.
A few things hold it back:
Get the SDR seniority, the specific US-based delivery team assigned, and the pricing tier scope in writing before signing. If any answer is vague, look at other certified agencies here alongside.
I have not been a Leadium client, so this review is research-based.
I read their homepage, pricing page, and services pages. I pulled the full Clutch review set (76 reviews, top 11 in detail), searched G2 (4.3 stars with mixed feedback), and cross-referenced Outsource Accelerator, SalesHive, Sales So, Salaria Sales, and SalesBread for third-party pricing and analysis.
I also verified Kevin Warner's background via LinkedIn, the Sales Transformation Podcast he hosts, and Clutch's Delaware business entity records (Leadium, Inc., formed November 29, 2016, active status).
I judged them on four things: the boutique restructure claim (does 30 to 35 active clients hold up?), the pricing tier vs. delivered value, the Clutch-G2 rating gap, and whether the founder-led promise survives at scale.
Everything below marked "reports" or "says" comes from their own material or verified Clutch reviews.
Leadium sells one core outcome: qualified B2B sales meetings delivered through a fully managed SDR program, run by US-based senior SDRs. The work runs across six service areas.
Full-service campaigns across email, phone, LinkedIn, SMS, and gifting. Their site describes this as their flagship service, focused on booking qualified sales meetings that convert.
Sub-5-minute speed-to-lead for MQL to SQL conversion. Amada Senior Care's Clutch review confirms this was implemented for their high inbound flow with sub-5-minute speed to first contact.
100% human-sourced and validated contact data. Leadium claims a "100% accuracy guarantee" on lead generation research, which is unusual in the industry.
Coordinated multi-channel outreach across email, phone, and LinkedIn. Their site emphasizes personalization based on cognitive behavior and personality insights per prospect.
Strategy consulting for internal SDR teams, including sequence writing, sales technology setup, and analytic review implementation.
Dedicated sending domains, warmup, SPF/DKIM/DMARC setup, list hygiene, and deliverability monitoring. Their infrastructure work is bundled into the retainer.
Every Leadium cell comes from their public material, Clutch, or verified business records. Confirm the specifics on your discovery call.
Their pricing page describes a structured onboarding process. Here is how that maps onto what a client actually experiences, based on 76 Clutch reviews.
Every engagement starts with defining ICP, personas, pain hypotheses, and value props, then sizing your TAM and prioritizing segments. Multiple Clutch reviewers cited this discovery phase as more thorough than other agencies they had used.
Ask them to define what counts as a qualified meeting in writing before campaigns launch. This is where the retainer economics get set.
Multi-source research, enrichment, and triple-verification for direct dials and deliverable emails. Leadium claims to be "the only lead generation company to offer a 100% accuracy guarantee" on research.
Ask for a sample list of 50 records before campaigns launch. Data quality is where the campaign outcome gets set.
Custom emails, call talk-tracks, InMail/DM scripts, and CTAs are tested and iterated weekly. Sales So's third-party analysis flags "calibration friction" in the first 7-10 days, with 2-3 rounds of copy edits typical.
Ask if you can approve the copy before it sends. You should sign off on at least the first campaign. If you want to run this same channel mix with your own team, my roundup of the best multichannel outreach tools covers the software side of the same problem.
Programs launch in approximately 2 to 3 weeks with clean ICPs. Faster with existing tooling. Campaigns run across email, phone, LinkedIn, and SMS.
Ask about ramp reality vs. marketing timeline. Amada Senior Care's engagement confirmed the fast onboarding claim, but calibration friction is a documented pattern in the first 2 weeks.
Calendar booking, confirmation, reschedule handling, and CRM logging to Salesforce or HubSpot. Weekly iteration on what is working.
Ask specifically about the held meeting rate vs. booked. Reviewer patterns suggest 10 to 22 qualified appointments per month is typical for a single dedicated SDR.
Dashboards for meetings booked/held, SAL/SQL, opps, pipeline value, and qualitative call notes. Leadium's own framework covers (Meetings Held × SAL% × SQL% × Win Rate × ACV) as the ROI math.
Ask for a sample report and agree on a weekly review cadence. If you want to compare against a retainer-model competitor, my Belkins review covers what a US-focused retainer scale looks like.
Leadium does not publish pricing on their main website. Their pricing page asks prospects to select a monthly budget range starting in the low thousands, then routes to a sales consultation.

Per Leadium's pricing page: "Specific to appointment setting, together, our teams identify initial market segments that we'll be targeting and define specific ideal customer profile parameters.
Our research team then follows a rigorous process of sourcing decision-makers at each of your target accounts before validating and channel-optimizing their contact details.
Once this data is provided to our clients for review and approval, it gets activated in the specific outbound campaigns created for each market segment. At this stage, if a prospect agrees to connect on a sales call, we consider it qualified."
That is a "prospect agrees to a call" bar, which is a low definition compared to BANT-qualified. Ask for the specific qualification checklist and what percentage of booked meetings are typically re-qualified as SAL and SQL post-call.
Here is what Leadium's site and Clutch reviews suggest about client-level economics.
At $3,500/month for 15 monthly meetings, that is roughly $233 per booked meeting. Compared to SalesGent's $250 per qualified meeting on pay-per-performance, Leadium's flat-retainer math sits close to break-even, but with the trade-off of paying whether meetings are delivered or not.
The base $3,500/month price is clear. Everything wrapped around scale (multi-SDR, multi-region, additional channels) needs a specific answer.
Based on their published work and 76 Clutch reviews, Leadium fits you well if:
Skip them, or at least compare harder, if:
If your monthly outbound volume is under a few hundred emails, you may not need an agency at all. Running Salesforge yourself at $48 per month covers that volume with warmup included.
Leadium publishes case studies on their site and features named client logos on their homepage. Here are the most detailed cases with all figures as reported by Leadium or verified in Clutch reviews.
Plus named enterprise client logos on the homepage: Goodyear, Rackspace, HackerOne, OpenEdge, SignalWire, Phunware, Bottomline, PFL, Medpanel, Veem, FusionStorm.
Two things stand out. The client range is broad (senior care to renewable energy to fintech to industrial), and the multi-year retention is real. Amada Senior Care at 3+ years with 4 SDRs is substantive. And the case study specificity beats vague "boosted pipeline" claims.
The caveat is worth flagging. Most Clutch reviews are from smaller SMB clients (under $10K project size dominates), even though Leadium markets enterprise credibility with Goodyear and HackerOne. Ask specifically about enterprise engagement structure vs. SMB engagement structure. They may be different beasts.
Every agency has trade-offs, and it's better to know them before you sign. Here are the ones I found from public information and reviews.
None of these should rule Leadium out on their own. But if two or more matter to you, compare agencies that answer these questions on their public profiles.
If you want a competitor perspective, my Callbox review covers a much larger operator with genuine APAC/EMEA coverage.
Do not Google "SDR agency" and pick the first result. Compare a few agencies whose practices you can actually verify.
The Forge Expert Network is a directory of agencies certified on the Forge ecosystem. Certification requires completing Salesforge's cold email training and meeting program eligibility requirements, so every listed agency has a disclosed, modern outbound stack.
Here are three certified agencies matched to different Leadium gaps.
Best for: Buyers who want Leadium's US-based delivery but with a stronger performance guarantee instead of a pure retainer.
Forge rating: 5/5

This is the direct answer if Leadium's "no performance guarantee" clause makes you uncomfortable. Outbound Pros runs multi-channel outbound (email, LinkedIn, cold calling, PPC) with a guarantee of 50 to 75 qualified meetings per month on a commission-based pricing structure. Their profile also states dedicated owned domain infrastructure with documented SPF, DKIM, and DMARC setup.
For a similar or lower monthly cost, you get a meeting volume commitment Leadium will not sign.
Best for: $5M to $50M ARR companies that want to keep the system after the engagement ends.
Forge rating: 5/5

Choose this one if you want Leadium's boutique founder-led approach but with clearer exit terms and knowledge transfer built in. Growth Alliance offers programs from $10K/month with 60-day rolling cancellation and a 90-day sprint methodology.
Their profile says systems are built to become the client's own and keep running afterwards, and that they cap engagements at four to six clients with 100 to 120 hours each per month. Their case study reports founder Spencer Tahil running 1,000+ client domains and mailboxes above a Heat Score of 89. That is more infrastructure ownership than Leadium promises.
Best for: Buyers who want Leadium's boutique-agency model but with published entry pricing and European market coverage.
Forge rating: 5/5

Look here if Leadium's US-only delivery blocks European campaigns. The SalesAR profile publishes a starting price of $2,500 per month (below Leadium's $3,500 entry) and lists EU and US markets against Leadium's US-only footprint.
Their profile reports 700+ clients served, 30,000+ appointments set, and an 80% contract renewal rate. It carries a named client testimonial from Akridata reporting 190+ appointments and a rise in closed-won deals.
Two routes skip the agency entirely.
Run outbound yourself with Salesforge. It starts at $48 per month with unlimited mailboxes and free warmup included, plus a 14-day free trial.
Or hire Agent Frank, Salesforge's autonomous AI SDR, from $499 per month billed quarterly. He handles prospecting, sequencing, replies, and meeting booking on his own. He is a separate subscription, and he needs a demo plus a two-week warm-up before he can send.

Take these into your discovery call. Their answers will tell you more than any review, including this one.
Leadium is worth considering if you want a founder-led, US-only, boutique SDR partner with month-to-month flexibility, you can allocate $3,500 to $15,000/month, and you value senior US-based delivery over cheaper offshore alternatives.
Their boutique restructure is real. 30 to 35 active clients, ~60 US-based employees, and Kevin Warner's operational credibility (previous company acquired by CIENCE) give Leadium a legitimate quality-first positioning that newer agencies cannot match. And their 76 Clutch reviews with a Premier Verified badge signal a strong majority-positive client base.
But the Clutch (5.0) to G2 (4.3) rating gap is real. The G2 tags on lead quality, miscommunication, and high turnover are worth surfacing on your discovery call. The "100% US-based" marketing conflicts with Kyiv and Santo Domingo office listings still on Clutch. And their qualification standard is low (any agreed-to call counts as qualified), which means the meeting volume you get may include leads that would not convert.
I would shortlist them for a US mid-market SaaS or professional services company wanting a US-only senior SDR program with month-to-month flexibility, at $5,000 to $10,000/month for one to two dedicated SDRs. I would not shortlist them for European campaigns, high-volume programs above 30 meetings/month, or buyers who need strong performance guarantees.
If you need European delivery, pay-per-performance pricing, or infrastructure ownership guarantees, compare certified agencies that already publish those terms.
Yes. Leadium, Inc. is a Delaware-registered corporation, actively formed November 29, 2016. Headquartered in Las Vegas, Nevada, with founder and CEO Kevin Warner (previous company Leadware acquired by CIENCE). The company employs approximately 60 people (down from a historical 550+ globally after a deliberate restructure to a US-only boutique model). Named clients include Goodyear, Rackspace, HackerOne, Amada Senior Care, and Hallmark Luxury Care Homes. Clutch verified 48 client reviews with 5.0 stars and issued a Premier Verified badge. NGLCC-certified (LGBTBE).
Leadium starts at $3,500/month for a dedicated cold-calling SDR (per G2 disclosure). Typical engagements range from $3,000 to $15,000/month depending on the number of SDRs, target markets, and channels. Most common Clutch project size is $10,000 to $49,999. One reported large engagement ran 98,000over6months(~16,000/month). Contracts are month-to-month with no long-term lock-in.
No. Per Leadium's pricing page: "We do not provide performance guarantees for the outcomes of our outbound sales efforts." They do offer a 100% accuracy guarantee on lead generation research data, but not on appointment volume or outcomes. The month-to-month contract structure is the closest thing to a performance signal (you can cancel in 30 days if quality is off).
Leadium sits at 5.0 stars across 76 Clutch reviews (Premier Verified) and 4.3 stars on G2 with more mixed feedback. G2 reviewer tags flag "Poor Lead Quality (3), Miscommunication (2), Poor Customer Support (1), Insufficient Training (1), High Turnover (1)." The gap often reflects reviewer selection dynamics. Clutch reviews are frequently solicited through structured flows; G2 skews more organic. Ask them directly to address the G2 tags in your discovery call.
Kevin Warner is Founder and CEO of Leadium. His background includes founding team roles at WayUp (Y Combinator) and MOKO (ASX to Nasdaq $30M exit). He is a former Extole team member. He founded Leadware, which was acquired by CIENCE. He runs the Sales Transformation Podcast. Warner has spent 12+ years in B2B lead generation and outbound sales, and led over 1,500 client programs before deliberately restructuring Leadium from 550+ employees to a boutique US-only model.
Kevin Warner's previous company, Leadware, was acquired by CIENCE, giving Leadium's founding team direct experience with CIENCE's model. Leadium deliberately positions itself as the opposite of CIENCE: boutique instead of scale (30 to 35 active clients vs. thousands), US-only instead of hybrid US/Philippines, founder-led instead of large-team. Different bet on how quality SDR delivery should be structured. My CIENCE review covers the larger competitor if you want to compare directly.
Three certified agencies in the Forge Expert Network answer specific gaps. Outbound Pros offers commission-based pricing with a 50 to 75 qualified meetings monthly guarantee (something Leadium will not sign). Growth Alliance builds systems clients keep after engagement with 60-day rolling cancellation. SalesAR publishes a $2,500 starting price with EU + US coverage. For smaller volumes, running Salesforge in-house from $48/month is a leaner alternative.





