GrowthStack Advisory / US B2B SaaS
Remote coverage, US business hours, an AWS Marketplace client
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.
GrowthStack builds outbound engines for B2B SaaS companies selling into the United States. The named credential is nuvista.ai, an AWS Advanced Consulting Partner based in Atlanta, Georgia, listed on AWS Marketplace with two products. GrowthStack built its outbound engine from zero, covering markets, ICPs, personas, messaging, tooling and event prospecting, 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, alongside Europe, the Middle East and Asia. Engagements run in ninety day cycles and end with the system handed to your team. Note the honest limit: nuvista.ai is one named US client, not a roster, and delivery is remote rather than from a US office, and that is stated here rather than left for you to discover.
Prior in-house roles are labelled as such. Named client work is listed separately in the case studies.
The Atlanta credential, stated plainly
nuvista.ai is an AWS Advanced Consulting Partner based in Atlanta, Georgia, 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.
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
A handful of calls a month end with us saying this is not the right piece of work. Cheaper for everyone if that happens before the call.
- 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 want a roster of US client logos before signing. There is one named US client with an independently verifiable credential, not a portfolio of them. That is a real gap and worth weighing.
- 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.
Is nuvista.ai your only US client?+
Yes, and it would be misleading to imply otherwise. The US case rests on one named client with an independently verifiable credential, plus a decade of in-house experience covering the US as one territory inside a larger SDR organisation. If a roster of US client logos matters more to you than that combination, that is a fair reason to choose someone else.
Why does the AWS Marketplace listing matter?+
Because it is not GrowthStack's claim to verify. nuvista.ai's Advanced Consulting Partner status and its two AWS Marketplace listings, AIHouse and Application Modernization with Data and AI, are published by AWS and by nuvista.ai directly, so the credential can be checked independently of anything written on this page.
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.
Related reading
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.
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