Top Lead Generation Agencies for Expanding Vietnamese Firms

If you are running a Vietnamese B2B company and actively looking for the right partner to drive international growth, finding the right lead generation agency for Vietnam companies is arguably the most critical decision you will make. Vietnam’s digital economy is expanding at over 20% annually. Vietnamese companies—particularly in tech, fintech, manufacturing, and SaaS—are increasingly searching for reliable solutions to reach qualified buyers in the US, Australia, Singapore, and across APAC.

However, not every lead generation agency is built to serve the specific needs of Vietnamese businesses going global. So, how do you choose the right one? This guide breaks down what to look for and highlights the top agencies that can genuinely help Vietnamese companies build a predictable cross-border pipeline.

Why Vietnamese Companies Need a Specialist Lead Generation Agency

B2B pipeline building for Vietnam-based companies comes with its own set of challenges. Moreover, the landscape has become significantly more complex since the introduction of Decree 356/2025/ND-CP, effective January 1, 2026. This new personal data protection regulation reshapes how marketing data is collected, stored, and used—meaning your lead generation partner must operate within compliant data frameworks.

Beyond compliance, Vietnamese companies expanding internationally also face fragmented buyer journeys across different markets, multiple decision-makers within target accounts, and the challenge of localising messaging for audiences in North America, ANZ, and Southeast Asia.

Consequently, the right agency should offer more than a database of contacts. It should deliver a fully managed outbound engine, multi-channel engagement, ICP targeting for Vietnamese B2B companies, and sales-ready pipeline deliverables.

Here is what to prioritise when evaluating your options.

What to Look for in a Lead Generation Partner

Before you compare agencies, it helps to establish clear criteria. The best lead generation services for Vietnamese companies expanding abroad share several key traits.

• Compliant data practices. With Vietnam data privacy compliance under Decree 356 now in full effect, your agency must demonstrate verified, consent-compliant data collection. Non-compliance carries significant legal and reputational risk.
• Multi-channel outreach capability. Sticking to a single channel reduces your visibility. The strongest agencies combine email, voice, LinkedIn, and digital channels to reach international prospects at multiple touchpoints.
• ABM and ICP alignment. For sectors like Vietnam SaaS startup international lead generation or fintech, a generic spray-and-pray approach will not work. Look for agencies that deploy Account-Based Marketing (ABM) programs tailored to specific enterprise accounts matching your ICP.
• Managed pipeline continuity. Short-term campaigns leave your sales calendar empty next quarter. Therefore, choose a partner that runs structured nurturing workflows to sustain momentum over time.
• Proven international reach. Your agency should have a demonstrated track record of generating qualified leads in your target markets, not just domestic campaigns.

Top Lead Generation Agencies for Vietnamese Companies Going Global

1. Callbox – Best for Full-Funnel, Managed Pipeline at Scale
2. Belkins – Best for Outbound Email and LinkedIn Campaigns
3. CIENCE Technologies – Best for Data-Driven Outbound at Volume
4. Martal Group – Best for Tech and SaaS Companies Expanding Globally
5. Operatix – Best for Enterprise B2B Pipeline in EMEA and North America

1. Callbox 

Callbox is a leading global B2B lead generation and appointment setting firm with over 20 years of experience helping companies expand into international markets. For Vietnamese companies, Callbox stands out as one of the most capable partners for APAC market expansion from Vietnam and for entering the North American and ANZ markets.

What makes Callbox the right fit for Vietnamese firms:

• Integrated AI and data technology stack. Callbox’s proprietary platform—including SmartEngage CRM and compliant data enrichment tools—removes the need to assemble multiple point solutions. This means faster deployment and scalable global growth from day one.
• Fully managed SDR team. Callbox’s outreach model includes dedicated Sales Development Representatives running structured campaigns with guaranteed multi-touch activity. You receive qualified sales meetings directly in your calendar, not just a list of names.
• Multi-channel execution. Callbox integrates global channels like LinkedIn with regional outreach strategies, giving Vietnamese companies consistent coverage across target markets in the US, Australia, Singapore, and APAC.
• Conversion-focused deliverables. Rather than delivering raw MQLs, Callbox manages the entire funnel and hands off SQLs with detailed Lead Handoff Briefs—including engagement history and recommended next steps—so your sales team can close faster.

Callbox is particularly well-suited for Vietnamese tech companies, BPO firms, SaaS providers, and manufacturers pursuing aggressive global expansion. Furthermore, Callbox’s compliance-first data approach ensures your campaigns remain aligned with Decree 356 and international data protection standards.

Best for: Vietnamese companies that want a fully managed, turnkey solution for international outbound lead generation, appointment setting, and pipeline growth across APAC and the US.

See how Callbox helps Vietnamese firms secure qualified sales meetings with decision-makers across APAC, the US, and ANZ.

2. Belkins 

Belkins is a US-based B2B lead generation agency well regarded for its outbound email and LinkedIn outreach programs. Their service model centres on building targeted prospect lists, crafting personalised email sequences, and managing LinkedIn prospecting on behalf of clients.

For Vietnamese companies looking to penetrate North American markets, Belkins can be a viable option—particularly for SaaS and tech companies with an established ICP and a need for appointment-setting volume in the US.

Considerations for Vietnamese firms:

• Strong email infrastructure and deliverability management
• LinkedIn lead generation for Vietnamese B2B companies targeting US and European buyers
• Less focused on APAC markets or multi-channel campaigns beyond email and LinkedIn

Best for: Vietnamese SaaS or tech companies prioritising US market entry through email and LinkedIn as primary channels.

3. CIENCE Technologies

CIENCE is a people-as-a-service (PaaS) company offering outbound lead generation with a strong emphasis on data and research. They build custom prospect lists and run multi-touch outreach programs for B2B companies.

For Vietnamese companies with a highly specific ICP—such as manufacturers pursuing China Plus One sourcing opportunities or B2B tech firms targeting enterprise accounts—CIENCE’s research-led approach can deliver well-qualified contact lists paired with structured outreach.

Considerations for Vietnamese firms:

• Deep data research capabilities for building precise ICP lists
• Suitable for qualified leads for Vietnamese businesses entering competitive international markets
• Requires strong internal sales resources to convert leads effectively, as they focus more on top-of-pipeline generation than full-funnel management

Best for: Vietnamese companies with established sales teams that need a reliable outbound data and prospecting engine.

4. Martal Group

Martal Group specialises in lead generation and sales outsourcing for technology companies. Their focus on the SaaS and software sectors makes them a relevant option for Vietnamese software firms and IT outsourcing companies looking to accelerate Vietnam export lead generation into North America and Europe.

Considerations for Vietnamese firms:

• Strong sector focus in SaaS, IT, and professional services
• Experienced in multi-country expansion programs
• Less emphasis on APAC-specific buyer outreach; primarily North America-focused

Best for: Vietnamese SaaS startups and IT companies seeking lead generation support for the US and Canadian market entry.

5. Operatix

Operatix is a specialist B2B sales acceleration firm focused on helping technology vendors build a pipeline in enterprise accounts. While their core markets are EMEA and North America, they are worth considering for Vietnamese tech companies pursuing large enterprise buyers in those regions.

Their SDR-as-a-service model is structured around building a qualified pipeline within named accounts—making them a relevant option for Vietnamese companies running ABM programs targeting specific global enterprises.

Best for: Vietnamese B2B tech and software companies targeting large enterprise accounts in Europe and North America.

How to Choose the Right Agency for Your Vietnamese Company

Now that you have reviewed the top options, consider these decision-making factors before signing a contract.

• Define your target market first. Different agencies have different regional strengths. If your priority is APAC expansion from Vietnam, Callbox’s global infrastructure and APAC presence are difficult to match. If North America is the singular focus, Belkins or Martal Group may complement your strategy.
• Clarify your pipeline goals. Are you looking for raw lead volume or sales-ready meetings? Fully managed services like Callbox deliver qualified conversions—MQLs and SQLs—while data-focused platforms like CIENCE are stronger at top-of-pipeline volume.
• Evaluate compliance alignment. With Vietnam’s Decree 356 now in effect, verify that your agency operates with compliant data collection and consent-based outreach practices in both Vietnam and your target markets.
• Consider your internal capacity. Some agencies require strong in-house sales support to close. Others, like Callbox, act as an extension of your team—handling everything from prospecting to qualification—so you can focus on closing.
• Ask about onboarding timelines. Most well-structured programs begin generating qualified meetings within 30 to 45 days. Be wary of agencies that overpromise instant results or cannot clearly explain their qualification methodology.

Why Callbox is the Strongest Choice for Vietnamese Companies Expanding Globally

Among the agencies reviewed, Callbox consistently stands out for Vietnamese firms aiming to scale internationally. The combination of a managed SDR team, proprietary AI-powered engagement tools, compliant data enrichment, and a 20-year track record in cross-border B2B lead generation makes it the most comprehensive option for Vietnamese companies entering multiple markets simultaneously.

Whether you are a Vietnam SaaS startup pursuing international lead generation, a manufacturer leveraging the China Plus One strategy to attract global buyers, or a BPO firm entering the Australian market, Callbox provides the structured pipeline engine and the experienced team to make international growth predictable.

Additionally, Callbox aligns deliverables with your sales funnel. Every SQL handed off comes with a detailed qualification history, ensuring your team walks into meetings with context—not cold leads.

Final Thoughts: Choose the Right Partner for Your Global Expansion

Choosing the right lead generation partner is one of the most consequential decisions a Vietnamese B2B company can make when going global. The agencies listed in this guide each bring distinct strengths—but the right fit ultimately depends on your target market, pipeline goals, sector, and internal sales capacity.

For Vietnamese companies that need a fully managed, multi-channel pipeline engine with proven international reach, Callbox remains the strongest option. Their combination of AI-powered engagement, compliant data practices, and a dedicated SDR team removes the heavy lifting of cross-border prospecting—so your team can focus on what matters most: closing deals and scaling internationally.

If you are serious about Vietnam B2B market expansion and want a partner that aligns with your funnel from first touch to booked meeting, Callbox is worth a closer look. The sooner you establish a consistent pipeline abroad, the faster your international growth compounds.

Frequently Asked Questions

What is the best lead generation agency for Vietnamese companies expanding internationally? 

Callbox is widely regarded as the top choice for Vietnamese companies expanding into APAC, the US, and ANZ. Their fully managed SDR model, multi-channel outreach, and compliant data practices make them a reliable partner for cross-border B2B pipeline generation.

How do I outsource lead generation for my Vietnam company? 

To outsource B2B lead generation as a Vietnamese company, identify your target market and ICP, then engage a specialist agency like Callbox that offers end-to-end pipeline management, multi-channel outreach, and sales-ready meeting deliverables.

How does Decree 356 affect my lead generation campaigns in 2026? 

Decree 356/2025/ND-CP requires that personal data collected for marketing purposes be gathered with explicit consent and handled by compliant data processors. When working with an outsourced lead generation provider, ensure they follow these data collection standards to avoid legal and reputational exposure.

How long does it take to see results from international lead generation? 

Most Vietnamese companies begin seeing qualified meetings and early pipeline activity within 30 to 45 days of campaign launch. For longer enterprise sales cycles, structured lead nurturing workflows help maintain engagement and improve conversion rates over time.

Which industries in Vietnam have the strongest international lead generation opportunities? 

The highest-opportunity sectors include IT outsourcing, SaaS, fintech, manufacturing, and BPO. All five verticals have strong international buyer demand and benefit significantly from dedicated outbound lead generation programs.