GrowthStack Advisory / US B2B SaaS

B2B lead generation for US B2B SaaS companies, anchored on a named AWS partner.

Outbound and go-to-market for B2B SaaS companies selling into the United States. Delivered remotely, on US business hours, by an operator with a decade of US coverage inside larger territories before GrowthStack existed.

The short answer

GrowthStack builds outbound engines for B2B SaaS companies selling into the United States, run on US business hours and handed to your team after a 90 day engagement. For NuVista AI, an AWS Advanced Consulting Partner in Atlanta, GrowthStack built the outbound engine from zero: markets, ICPs, personas, messaging, tooling and event prospecting around AWS Summits, producing revenue and additional qualified opportunities. In-house, Shobhit Gupta opened the US through outbound at Locus and covered it at GoComet alongside other territories.

$50KRevenue plus qualified opportunitiesNuVista AI · from zero

AWSAdvanced Consulting PartnerNuVista AI · Atlanta, GA

$20M+Opportunities createdPrior role · Locus, incl. US

90 daysOne attribution cycleEngagement length

Prior in-house roles are labelled as such. Named client work is listed separately in the case studies.

The Atlanta credential

NuVista AI is an AWS Advanced Consulting Partner based in Atlanta, Georgia, offering data platform modernization, cloud migration and AI-powered solutions on AWS. That is a status AWS itself confirms rather than something claimed only on this page. NuVista AI is also listed on AWS Marketplace with two products: AIHouse, an AI service delivered as software, and Application Modernization with Data and AI. Both listings are published and maintained by AWS and by NuVista AI directly.

There was no outbound motion when the engagement started. GrowthStack built the markets, ICPs and personas from a hypothesis about who had the problem, then corrected it against what actually converted, the same order used on every engagement described on this site. Messaging, tooling, domain and inbox authentication, and sequences followed. Event prospecting ran as a first-class channel rather than an afterthought: NuVista AI co-hosted an in-person AWS workshop in Washington DC on modern analytics and AI, with account segmentation before the event, meeting generation during it, and structured follow up after, which is the part most teams skip and where the pipeline actually lands.

Separately, Shobhit Gupta's in-house record already covered the United States for a decade before GrowthStack existed. At Locus he ran a distributed SDR team spanning the United States, Europe, the Middle East and Asia, work that contributed to $20M in opportunities and moved MQL to SQL conversion from 10% to 25%. At GoComet the SDR team he scaled from 10 to 23 people covered the United States alongside India and South East Asia.

There is an earlier version of this problem worth describing, because it is the one most companies outside the US actually face. At Locus, a logistics SaaS platform selling across Indonesia, Singapore, Europe and the United States, inbound was arriving steadily from South East Asia and India and barely at all from the United States. A handful of enquiries a week. The US was the market the company wanted and the only one its inbound could not reach.

So the US and Europe were opened from outbound instead, deliberately, as a separate motion from the one already working. Shobhit Gupta built that cadence and then hired against it: ultimately a distributed team of twelve, with three people in the United States, three to four across South East Asia, and the remainder covering Europe, the Middle East and India. Building the engine first and hiring to replicate it is the same sequence GrowthStack runs for clients today.

One detail dates the work usefully. At the time, the sending tools now taken for granted were not capable of what was needed, so the A/B tested cadences ran on Pardot and Salesforce Sequences instead. Reply rate held around 5%. Open rate ran between 40% and 50%, and that second number should be read with care rather than quoted: since Apple Mail Privacy Protection began pre-fetching images in September 2021, open rate has not been a trustworthy measure of anything. It was a usable signal then and it is noise now, which is why nothing on this site reports outbound performance in opens.

What is actually different about selling B2B SaaS into the US

The buying committee is larger than it looks. A typical complex B2B purchase runs six to ten decision makers, each independently gathering four or five pieces of information (Gartner), and more than three quarters describe the process as very complex or difficult (Gartner). A sequence that books one of them and stops has not booked the deal.
It is the most contested market for generic outbound. Volume alone does not move a US buying group; it mostly trains them to ignore another cold sequence. A credibility signal that can be checked independently, like a real AWS partner status, carries more weight than another line of copy.
Deliverability infrastructure is not optional. US inbox providers filter aggressively. Domain and mailbox authentication, SPF, DKIM, DMARC and a custom tracking domain, is set up before any volume goes out, the same discipline behind every outbound engine described on this site.
Time zone coverage has to be deliberate, not assumed. Sequencing, calling windows and reporting are built around US business hours, which is exactly what covering the United States from Locus and GoComet, alongside other territories, already required.

Who this is for

B2B SaaS companies opening or fixing a US motion. The product already sells somewhere. The question is whether the same motion works into the United States specifically.
Companies without an in-country GTM team yet. This builds the first structured outbound function for the US market rather than replacing one that already exists.
AWS-adjacent and cloud infrastructure vendors. The NuVista AI engagement is the closest evidence: a real AWS Advanced Consulting Partner, built from zero.
Teams that want the system, not a lead list. Ninety days ends with the engine handed to your team, not with a subscription that keeps running after the value stops.

What a ninety day engagement produces

The same six pieces built for NuVista AI, specialised to whichever segment of the US market you sell into.

ICP and account tiering. Segmented for the US market specifically rather than blended into a global average that hides which segment is actually working.
Personas and messaging. Written for the US buying committee, with proof points mapped to each stakeholder rather than one message aimed at all of them.
Sequences and deliverability. Email, LinkedIn and calling, with SPF, DKIM, DMARC and a custom tracking domain set up before volume goes out.
Toolstack and CRM workflows. Stages, fields and automation that enforce the process rather than rely on memory.
Live outreach and iteration. Sequences run on US business hours, replies read across the campaign, and the messaging changed on what came back.
Handover. Playbooks, dashboards and a trained team. You own the engine afterwards.

The engagement ends with the handover, not with a renewal conversation. Sequences, workflows, dashboards and playbooks stay with your team, and your team is trained to run them.

Who this is not for

You want a US-based team on the ground. GrowthStack is two people working remotely. If the requirement is a physical US presence, that is a different kind of supplier.
You need enterprise, in-person selling from day one. This builds the outbound engine that fills the pipeline. It is not a substitute for a field sales team on complex enterprise deals.

Not sure which applies? Run the eight question diagnostic against your stage and budget.

Frequently asked questions

Do you work with companies in the United States?+

Yes. The named client is NuVista AI, an AWS Advanced Consulting Partner based in Atlanta, Georgia, listed on AWS Marketplace with two products, AIHouse and Application Modernization with Data and AI. GrowthStack built the outbound engine from zero: markets, ICPs, personas, messaging, tooling, event prospecting and outreach, which produced approximately $50,000 in revenue plus additional qualified opportunities. Earlier, running sales development in-house at Locus and GoComet, Shobhit Gupta covered the United States as one of several territories inside a single SDR organisation for a decade before GrowthStack existed.

Is GrowthStack based in the United States?+

No. GrowthStack is two people working remotely, and the NuVista AI engagement, like all client work, was delivered on US business hours from outside the country. That is not new to this engagement: covering the United States remotely, alongside Europe, the Middle East and Asia, is what the in-house roles at Locus and GoComet already were.

How do you run outbound on US time zones from outside the country?+

The same way Locus and GoComet ran it: sequencing, calling windows and reporting are built around US business hours rather than the team's own, and the infrastructure work, authentication, sending domains and CRM workflows, is set up before volume goes out so deliverability does not become a second problem on top of the time zone one.

What is different about selling B2B SaaS into the US specifically?+

The buying committee is usually larger and the competitive set is the most saturated in the world for generic outbound. A typical complex B2B purchase runs six to ten decision makers, each gathering information independently (Gartner), so a sequence that books one stakeholder and stops has not booked the deal. Credibility signals that are independently checkable, like a real AWS partner status, do more work in a market this crowded than another line of outbound copy does.

What does this cost?+

The GTM Diagnostic is $750 and reviews your current ICP, outbound motion and CRM before you commit to more. Ongoing engagements are monthly retainers starting at $2,000, with a 90 day initial commitment recommended and third-party software paid separately.

US buyers weighing an autonomous AI BDR against hiring will find that comparison in best AI BDR software, which sets out what the job actually consists of before any tool is bought.

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.

Written and maintained by Shobhit Gupta, Founder and Principal GTM Consultant at GrowthStack Advisory. Ten years running sales development and revenue operations at Locus, GoComet and Landmark Group’s Logistiq division. LinkedIn.

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Written with AI assistance from Shobhit Gupta’s notes and client work, then reviewed and edited by Shobhit Gupta on 11 October 2026.