GrowthStack Advisory / B2B Lead Generation Services
B2B lead generation services, built to run without you.
Multi channel outbound across email, LinkedIn, and calling, with AI enhanced workflows underneath. Built as a system your team can operate after we hand it over, on a fractional engagement rather than a hire you are not ready for. The build order is public: see the first 90 days of outbound, week by week.
GrowthStack builds B2B outbound engines and hands them to your team. An engagement covers an ICP that filters the list, messaging built on the buyer’s problem, email, LinkedIn and calling sequences, a follow-up rule that holds, and reporting that shows which stage is leaking. It runs as a 90 day engagement from $2,000 a month after an optional $750 diagnostic, and your team keeps the playbooks, sequences, data and dashboards. Expect fewer leads at a higher quality, because fewer clear a tighter bar. On named client work, ConvertCart cut meeting no-shows from 44% to 15%.
What most outbound engines are missing
Almost every stalled outbound program we inherit has the same shape. There is tooling. There are sequences. There is activity. What is missing is the connective tissue: a defined ICP that filters the list, messaging built on the buyer's problem, a follow up rule that survives a busy week, and reporting that shows which part is actually failing. The sending estate itself is covered in cold email infrastructure setup.
Activity is easy to generate and easy to mistake for progress. Qualified pipeline is the only output that matters, and it is a function of targeting, message, cadence, and qualification working together.
What we build
- Market and account segmentation. Which segments to attack first, and which to deliberately ignore this quarter.
- List building and enrichment. Apollo, ZoomInfo, Sales Navigator, and Lusha configured so reps stop building lists by hand.
- Multi channel sequences. Email, LinkedIn, and calling designed as one motion rather than three disconnected efforts.
- AI assisted research and personalisation. Used to make the first line specific at volume, with human review before send.
- CRM workflows. Stages, fields, and automation that enforce the process instead of relying on rep memory.
- Reporting. Rep level and campaign level visibility so coaching is based on data.
Sequence and inbox optimization
Deliverability decays quietly. Reply rates fall, nobody notices for six weeks, and by then the domain reputation needs real repair. We handle the unglamorous layer: domain and inbox warmup, sending limits, spam trigger review, reply handling scripts, and sequence structure that earns a response instead of demanding one.
This work pairs directly with ICP and messaging. A perfect sequence sent to the wrong list still fails.
A worked example
NuVista AI, outbound engine from zero
We developed the markets, ICPs, personas, messaging, tooling, and outreach engine, including event and trade show pipeline generation with pre event prospecting, attendee outreach, and post event follow up. The program generated approximately $50,000 in revenue plus additional qualified opportunities.
Why response time quietly decides the outcome
Most teams obsess over the sequence and ignore the follow up. That is backwards. The clearest data in sales development is about speed, not copy. In the study that started this conversation, contacting a web lead within five minutes instead of thirty made a rep about twenty one times more likely to qualify it (Oldroyd, MIT Sloan and InsideSales.com, 2007). The odds fall off a cliff inside the first hour.
The uncomfortable part is how few teams manage it. An audit of 2,241 US companies found the average first response to a web lead was 42 hours, and 23% never replied at all (Harvard Business Review, 2011). More recent audits of B2B software companies are worse, not better. So the opportunity is rarely a cleverer email, it is a follow up rule that survives a busy week: who responds, how fast, and what happens when the owner is out. That one discipline is often the difference. Tightening inbound handling and qualification is how Easyship's subscription conversions rose 20% in the first month.
What gets built in that first phase, the sending domains, the mailbox count, authentication, verification and suppression, is set out in cold email infrastructure setup.
How to tell a real engine from a lead list
Plenty of providers will sell you meetings. Far fewer leave you with something that keeps working after they leave. Before you buy any lead generation service, ours included, these are the questions worth asking.
- Is there a defined ICP that filters the list, or is the list just large?
- Is the messaging built on the buyer's problem, or on your product?
- Is there a follow up rule, or does follow up depend on who remembers?
- Is there stage level reporting, so you can see which part is failing?
- Do you own the sequences, workflows and reporting afterwards, or does it all leave with the vendor?
If the answer to the last one is no, you are renting pipeline, not building an engine. We build it so your team can run it, then hand it over.
What have these engines produced?
Four engagements, three different starting points.
Easyship, a global shipping technology platform, already had inbound demand and no system behind it. GrowthStack runs the end-to-end conversion process: lead response, requirement discovery, qualification, follow-up, subscription closure and product activation. Inside the first month, subscription conversions rose 20% and the work contributed approximately $100,000 in pipeline. Closing that pipeline sat with Easyship’s own team.
WorkStore had paid-media leads from Meta and Google Ads with no structured inside-sales process behind them. Qualification moved from 5% to 30% and approximately ₹15 lakh closed within two months.
NuVista AI had nothing. The engine was built from zero: markets, ICPs, personas, messaging, tooling and outreach, including event-specific account segmentation, pre-event prospecting, attendee outreach and post-event follow-up. It generated approximately $50,000 in revenue plus additional qualified opportunities.
ConvertCart had a working outbound team and wanted more from it, so the work was rep output, meeting quality, follow-up discipline and reporting rather than anything new being built.
The full write-ups are in the case studies.
References
Go deeper
Who this is for
- B2B teams with a product that already sells. There is proof it works. What is missing is a repeatable way to start conversations.
- Founders doing outbound themselves. This builds the function so it stops depending on the founder having a good week.
- Teams with an SDR and no system around them. A rep without sequences, qualification criteria and reporting is being set up to fail.
- Teams that want to own the engine afterwards. Ninety days ends with a handover and a trained team, not a renewal conversation.
Who this is not for
- You want meetings booked and nothing else. That is an agency, and for some teams it is the right answer. We build the system and hand it over, which is slower to first meeting and cheaper to keep.
- The message still changes every week. Before product-market fit the target moves faster than a sequence can be tested, and outbound will measure the churn rather than the market.
- Your problem is traffic volume. If enquiries are not arriving at all, that is a demand problem upstream of anything outbound fixes.
Not sure which applies? Run the outbound readiness scorecard, which takes a couple of minutes.
Questions
How long does it take to build an outbound engine?+
Building from zero takes longer than optimising something that exists, because ICP, messaging, tooling, and sequences all have to be built before volume begins. Optimisation work on an existing motion can show movement faster. We give a realistic timeline after the diagnostic rather than promising a fixed number upfront.
Do you run the outbound for us or train our team?+
Both models exist. We can operate the motion as a fractional sales development function, or build the system and coach your team to run it. In either case the frameworks, sequences, workflows, and reporting are yours to keep.
Which tools do you work with?+
Salesforce, HubSpot, Outreach, Salesloft, Lemlist, Klenty, Apollo, Instantly, ZoomInfo, LinkedIn Sales Navigator, and Lusha, among others. We choose based on your stage and budget rather than defaulting to the most expensive stack.
Engagements start at $2,000 per month, after an optional $750 GTM diagnostic. See how pricing works, what is not included, and the notice terms.
Terms. A 90 day initial commitment is recommended, after which the engagement moves to a monthly model with 30 days’ written notice. Third-party software, data, domains and email infrastructure are paid by you and stay yours, so the engine does not leave when the engagement does. GrowthStack does not guarantee a fixed number of meetings, opportunities or revenue. Full pricing and terms.
Tell us where the funnel leaks
We will tell you whether it is a targeting, execution, or qualification problem, and what it would take to fix.
Book a CallGeography changes the targeting and the proof points rather than the method. The regional pages are US B2B SaaS and the UAE and Gulf.
Written with AI assistance from Shobhit Gupta’s notes and client work, then reviewed and edited by Shobhit Gupta on .