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. 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
LinkedIn
★★★★★
LinkedIn Outreach & Email Campaign

I was exceedingly impressed by their adept management of LinkedIn campaigns. 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

I wholeheartedly endorse them for exceptional lead generation services on LinkedIn. His expertise and unwavering commitment have significantly enhanced our outreach endeavors.

Oct 2024 · LinkedIn Verified
GJ
Guy Jackson
The Scale-up Launchpad · 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 / Akquire
LinkedIn
★★★★★
LinkedIn & Cold Email Outreach

His expertise in using LinkedIn and email outreach was invaluable in generating high-quality leads for us. Communication was excellent, and they kept us updated every step of the way.

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

Their market research and lead generation is world class. He built a truly custom ICP database that gives our marketing a true competitive advantage.

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

I have worked with Rakib for over three years because he exemplifies reliability, efficiency, and quality. Highly recommend.

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

His ability to quickly and efficiently find the right key decision-makers has been invaluable for our business growth.

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

I hired Advazon for two urgent research projects. Very quick, very responsive, and my data had 99% accuracy — very impressive for lead gen.

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

Rakib was instrumental in helping my team enter a new customer segment. Highly responsive, receptive to feedback, and delivers projects quickly and accurately.

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

Hired to set up Google Workspace email and fix deliverability. Excellent job, completed quickly, always answered emails fast.

Feb–Mar 2026 · Upwork Verified
Platform Standing

Verified Across Every Platform

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

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Verified Client Reviews

What Clients Say
After the Work.

★★★★★86% Open Rate

We are finally getting real conversations and real downloads. Advazon built a cold email engine that reached 20,000+ attorneys with an 86% average open rate.

N
Nick
Founder · Vikk.ai · LegalTech SaaS
★★★★★Upwork Verified

Advazon set up our entire cold email infrastructure from scratch. Our inbox placement went from around 40% to 94%+ and reply rates jumped to 8.4%.

JS
Jason Simmons
Founder · DeadSoxy
★★★★★LinkedIn Verified

I was exceedingly impressed by their adept management of LinkedIn campaigns. Their strategic approach to building contact lists significantly boosted our results.

LI
Lindsey Imperatore
President · CREtech
★★★★★LinkedIn Verified

I wholeheartedly endorse them for exceptional lead generation services on LinkedIn. His expertise and unwavering commitment have significantly enhanced our outreach endeavors.

ER
Ellen Rudolph
Co-founder & CEO · WellTheory
★★★★★LinkedIn Verified

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.

GJ
Guy Jackson
The Scale-up Launchpad · Investor
★★★★★LinkedIn Verified

His expertise in using LinkedIn and email outreach was invaluable in generating high-quality leads for us. Communication was excellent every step of the way.

DE
Daniel Eskandar
Founder · Dartera / Akquire
★★★★★3+ Year Client

I have worked with Rakib for over three years because he exemplifies reliability, efficiency, and quality. Highly recommend.

RC
Ransley Carpio
Consumer Brands · ex-L Catterton
★★★★★99% Data Accuracy

I hired Advazon for two urgent research projects. Very quick, very responsive, and my data had 99% accuracy — very impressive for lead gen.

AH
Angela Hamilton
SDR Ops & Enablement Leader
★★★★★LinkedIn Verified

Rakib was instrumental in helping my team enter a new customer segment. Highly responsive, receptive to feedback, and delivers projects quickly and accurately.

KG
Kathryn Gissiner Treser
Chief of Staff @ LinkedIn