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Verified Client Reviews

Real People.
Real Results.

Every review below is from a verified client on LinkedIn or Upwork. No fabricated quotes, no stock photos, no invented companies. Names and companies are publicly verifiable.

100+
B2B clients served across 3 continents
5.0
Verified average rating across all platforms
$5.2M
Revenue generated for clients
8+
Years as a B2B outbound specialist
Client Reviews

What Clients Say After the Work

JS
Jason Simmons
Founder · DeadSoxy · Corporate Gifting
Upwork 5.0
★★★★★
Cold Email Setup & Deliverability

Advazon set up our entire cold email infrastructure from scratch — domains, warmup, DNS records, and sequences. Our inbox placement went from around 40% to 94%+ and reply rates jumped to 8.4%. He clearly knows email deliverability better than anyone we have worked with before.

2025 · Upwork Verified
LI
Lindsey Imperatore
President · CREtech · Real Estate's Largest Meetings Program
LinkedIn
★★★★★
LinkedIn Outreach & Email Campaign

I was exceedingly impressed by their adept management of LinkedIn campaigns. Their proficient handling of personalized outreach to real estate professionals, connection requests, and invitations for London and New York events showcased their expertise. Their strategic approach to building contact lists for email drip campaigns significantly boosted our results.

Oct 2024 · LinkedIn Verified
ER
Ellen Rudolph
Co-founder & CEO · WellTheory · Forbes 30U30
LinkedIn
★★★★★
LinkedIn Lead Generation

Throughout the past year, I have had the pleasure of working with Advazon, and I wholeheartedly endorse them for exceptional lead generation services on LinkedIn. His expertise and unwavering commitment have significantly enhanced our outreach endeavors. Advazon's proactive approach and dedication to delivering tangible results make him an invaluable collaborator.

Oct 2024 · LinkedIn Verified
GJ
Guy Jackson
The Scale-up Launchpad · Non-Exec Director · Investor
LinkedIn
★★★★★
Lead Generation

Rakibul is the best lead gen expert that I have ever worked with. He is easy to work with, friendly and always delivers quality, in good time. Thoroughly recommended!

Oct 2024 · LinkedIn Verified
DE
Daniel Eskandar
Founder · Dartera · Founder · Akquire · Eskandar Capital AG
LinkedIn
★★★★★
LinkedIn & Cold Email Outreach

I had the pleasure of working with Advazon on a lead generation project and couldn't be happier with the results. His expertise in using LinkedIn and email outreach was invaluable in generating high-quality leads for us. Not only did Rakibul deliver on his promises, but they went above and beyond. His communication skills were excellent, and they kept us updated every step of the way.

Apr 2023 · LinkedIn Verified
RG
Ricky Gutteridge
CRO · President of Services · VC · Revenue Accelerator
LinkedIn
★★★★★
ICP Database & Lead Generation

I have been working with Advazon for over a year and their market research and lead generation is world class. He has been able to build a truly custom ICP database that gives our marketing efforts a true competitive advantage, with accuracy despite incredibly nuanced criteria. Rakib and his team are effective and I look forward to our future collaborations.

Mar 2020 · LinkedIn Verified
RC
Ransley Carpio
Consumer Brands · ex-L Catterton
LinkedIn
★★★★★
Lead Generation · 3+ Year Client

Anyone who has searched for virtual lead generation experts knows how difficult it is to find someone reliable, efficient, timely, and high quality. I have worked with Rakib for over three years because he exemplifies each of these qualities. He has been an integral part of the building of my group. Highly recommend.

Apr 2022 · 3+ year client · LinkedIn Verified
HC
Huawen Chen
Business Development & VP Assistant · International BD
LinkedIn
★★★★★
B2B Lead Generation & Outreach

I've had the pleasure of working with Advazon, and I can say he is an incredibly responsible and resourceful professional. Their ability to quickly and efficiently find the right key decision-makers has been invaluable for our business growth. I highly recommend Advazon for any role that requires problem-solving and a proactive approach.

Oct 2024 · LinkedIn Verified
AH
Angela Hamilton
SDR Ops & Enablement Leader · Playbooks, People & Pipeline
LinkedIn
★★★★★
Lead Generation · 99% Data Accuracy

I hired Advazon to do two separate and very urgent Lead Generation and Research projects. Not only was he very quick, the team was also very responsive and my data had 99% accuracy, which, if you are familiar with lead gen, is very impressive. I highly recommend Advazon.

Aug 2020 · LinkedIn Verified
KG
Kathryn Gissiner Treser
Chief of Staff @ LinkedIn · Direct Manager
LinkedIn
★★★★★
Lead Generation · Market Entry

Rakib was instrumental in helping my team enter a new customer segment. His lead generation skills helped us accelerate our entry by sourcing information that enabled us to start conversations with people in this segment. Rakib is highly responsive, receptive to feedback, and is able to deliver projects quickly and accurately.

Jul 2019 · LinkedIn Verified
UP
Upwork Client
DNS Expert · Google Workspace Migration
Upwork 5.0
★★★★★
Email Deliverability · DNS Setup

I hired Md to set up Google Workspace email for my Shopify store and fix Shopify deliverability. The team did an excellent job. The work was completed quickly, and they always answered emails quickly.

Feb–Mar 2026 · Upwork Verified · ⭐ 5.0
Platform Standing

Verified Across Every Platform

Top Rated Plus on Upwork
99% Job Success Score · Top 3% of freelancers · Active since 2017
★★★★★5.0 rating
Top Rated on Fiverr
Verified seller · B2B lead generation & cold email specialist
★★★★★5.0 rating
LinkedIn Verified Reviews
9 verified recommendations from clients, managers, and long-term collaborators
★★★★★All 5-star
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