The B2B Outbound Stack 2026
We test hundreds of tools so you don't have to. Here is our curated directory of the platforms powering elite revenue teams.
Clay
EnrichmentAutomated data enrichment workflows pulling from 50+ data providers.
How FlowStrata Uses It
We use Clay for complex waterfall enrichment sequences when building niche-specific datasets.
Apollo.io
ScrapingMassive B2B database with basic sequencing capabilities.
How FlowStrata Uses It
We use Apollo as a foundational data source, but never rely on it exclusively due to data decay.
Dropcontact
EnrichmentAlgorithm-based email finder and contact enrichment that complies with GDPR.
How FlowStrata Uses It
Our go-to enrichment tool for European data and algorithmically verifying messy data structures.
Cognism
EnrichmentPremium B2B data with a massive database of human-verified mobile numbers.
How FlowStrata Uses It
We use Cognism specifically for our Enterprise outbound campaigns heavily reliant on cold calling.
ZoomInfo
EnrichmentThe legacy giant of B2B data, strong in corporate America and intent data.
How FlowStrata Uses It
Used exclusively when targeting legacy enterprise, Fortune 500s, or when leveraging intent spikes.
Prospeo
EnrichmentExtremely accurate email finder specifically built for LinkedIn scraping.
How FlowStrata Uses It
One of the highest match rates we have found for generating verified emails from LinkedIn URLs.
Ocean.io
ScrapingContextual AI lookalike search based on existing customer domains.
How FlowStrata Uses It
When a client gives us their 10 best customers, we use Ocean to find 1,000 exact lookalikes.
Smartlead
SendingHigh-volume cold email infrastructure with infinite mailboxes and Master Inbox.
How FlowStrata Uses It
Smartlead is our primary infrastructure layer for scaling client sending volume safely.
Instantly
SendingUnlimited email sending accounts with a massive built-in warmup pool.
How FlowStrata Uses It
Great for rapid scaling. We deploy Instantly for campaigns requiring massive top-of-funnel reach.
Lemlist
SendingPioneered multi-channel sequencing and dynamic image personalization.
How FlowStrata Uses It
We use Lemlist for highly personalized, low-volume account-based marketing (ABM) sequences.
PhantomBuster
SocialCode-free automation and data extraction for LinkedIn.
How FlowStrata Uses It
Used for highly targeted, signal-based scraping like capturing event attendees or post commenters.
HeyReach
SocialAgency-focused LinkedIn automation tool managing multiple sender accounts safely.
How FlowStrata Uses It
Our primary tool for deploying multi-sender LinkedIn outreach on behalf of our clients.
Expandi
SocialCloud-based LinkedIn automation with strong safety guardrails.
How FlowStrata Uses It
Used for complex omni-channel campaigns combining Email and LinkedIn touchpoints.
Captain Data
SocialEnterprise-grade automation workflows connecting multiple APIs and scrapers.
How FlowStrata Uses It
We use Captain Data for complex, multi-step extraction and enrichment logic across platforms.
Attio
CRMHighly customizable, data-driven CRM built for modern startup teams.
How FlowStrata Uses It
We integrate our outbound engines directly into Attio for seamless handoffs of qualified leads.
HubSpot
CRMThe industry standard inbound marketing and sales CRM.
How FlowStrata Uses It
Most of our clients use HubSpot. We push booked meetings directly into their HubSpot pipelines.
Close
CRMA high-velocity sales CRM built specifically for outbound calling and emailing.
How FlowStrata Uses It
The best CRM for SDR teams. We recommend Close for clients scaling an internal sales floor.
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