Let's Encrypt vs Paid SSL: What's the Difference?

What Is Let's Encrypt?

Let's Encrypt is a Certificate Authority (CA) operated by the non-profit Internet Security Research Group (ISRG), launched in 2016 with a mission to make encrypted connections the default standard across the web — entirely free of charge.

Let's Encrypt issues SSL certificates automatically through the ACME protocol at no cost, is trusted by all major browsers, and has been deployed on over 300 million websites worldwide. Most hosting providers — including AsiaGB — include Let's Encrypt as an automatic part of every hosting package.

What Is a Paid SSL Certificate?

A paid SSL certificate is issued by a commercial Certificate Authority that has undergone rigorous audits and is recognized by international standards bodies. The leading brands available through AsiaGB are RapidSSL, GeoTrust, and DigiCert — globally trusted names in web security.

Paid SSL comes in DV (Domain Validation), OV (Organization Validation), and EV (Extended Validation) types, each with different verification processes and additional benefits that Let's Encrypt does not provide.

6-Point Comparison: Let's Encrypt vs Paid SSL

Point 1 — Price

Item	Let's Encrypt	Paid SSL
Cost	100% Free	From THB 1,000/year (~$26 USD)
Renewal fee	Free (automatic)	Paid renewal every 1–2 years

Let's Encrypt has zero cost, making it ideal for personal blogs, portfolio sites, or projects that need HTTPS with no budget. Paid SSL from AsiaGB starts at THB 1,000/year for a DV certificate from RapidSSL or GeoTrust.

Point 2 — Trust Level and Identity Validation

Item	Let's Encrypt	Paid SSL
Validation level	DV only	DV / OV / EV
Shows company name	No	Yes (OV/EV)
Best for	General websites	Businesses, organizations, financial institutions

Let's Encrypt only issues DV certificates, which confirm that the requester controls the domain — but do not verify that the website belongs to a legitimate legal entity. Paid OV/EV SSL goes through a thorough organizational identity verification process, providing visitors with greater assurance, especially important for websites handling financial transactions or sensitive personal data.

Point 3 — Warranty

Item	Let's Encrypt	Paid SSL
Warranty	None	Yes (from tens of thousands to millions of USD)
Coverage scenario	—	CA-caused mis-issuance leading to financial loss

SSL certificates from GeoTrust, DigiCert, and RapidSSL come with a warranty that provides financial protection in the event that the CA makes an error in issuing the certificate and it results in a loss. Let's Encrypt carries no such warranty. While certificate mis-issuance is rare in practice, having a warranty matters to businesses that hold accountability to their customers.

Point 4 — Wildcard SSL Support

Item	Let's Encrypt	Paid SSL
Wildcard SSL (*.domain.com)	Supported (via DNS challenge)	Supported
Setup complexity	DNS-01 challenge required at every renewal	Issued once, valid for 1–2 years

Let's Encrypt does support Wildcard SSL, but requires DNS-01 challenge validation and that same setup must be repeated every time the certificate renews every 90 days — which can be complex without automated DNS management. Paid Wildcard SSL is issued once and remains valid for 1–2 years with no additional action required.

Point 5 — Support

Item	Let's Encrypt	Paid SSL
Support from CA	None (community forums only)	Technical support from CA
Support from AsiaGB	Via hosting team	Full support throughout certificate lifetime

When issues arise with Let's Encrypt installation or configuration, you rely on community forums or your hosting provider's support team. Paid SSL includes direct Technical Support from the CA. AsiaGB also provides installation assistance and troubleshooting support throughout the certificate's lifetime for all paid SSL customers.

Point 6 — Validity Period and Renewal

Item	Let's Encrypt	Paid SSL
Certificate validity	90 days	1–2 years
Renewal process	Automatic (if correctly configured)	Pay and re-issue
Risk if renewal fails	Site shows "Not Secure" every 90 days	Lower — fewer renewal events

Let's Encrypt certificates expire every 90 days and must auto-renew frequently. If the auto-renewal process fails for any reason — DNS changes, temporary server downtime, misconfigured cron jobs — your website will immediately show a security warning. Paid SSL with a 1–2 year validity period significantly reduces this operational risk by minimizing the number of renewal events.

At-a-Glance Comparison: Let's Encrypt vs Paid SSL

To see everything in one place, the table below consolidates the key differences — certificate lifespan, validation level, warranty, support, OV/EV availability, and cost — so you can compare both options quickly before deciding.

Notice that the one area where both options are truly equal is encryption strength. Where paid SSL pulls ahead is higher-level identity validation, warranty coverage, a longer certificate lifespan, and direct support from the Certificate Authority.

Who Is Let's Encrypt Right For — and Who Isn't?

Let's Encrypt is an excellent choice for many use cases, but there are contexts where it falls short. Understanding which group you belong to helps you choose correctly from the start, without having to switch certificates midway.

A great fit for

• Personal blogs and portfolio sites that need HTTPS with no budget
• General information websites that don't accept payments or store sensitive customer data
• Dev / staging projects that need a quick, temporary certificate
• Sites whose hosting supports auto-renewal with consistent renewal monitoring
• Developers comfortable configuring ACME and DNS challenges themselves

Not ideal for

• E-commerce sites that want to build payment trust through OV/EV
• Organizations or financial institutions that need to display their company name in the certificate
• Businesses that need a warranty for financial protection against CA mis-issuance
• Anyone without renewal monitoring, since the 90-day lifespan risks silent expiry

When Should You Pay for SSL?

Paying for SSL is not wasteful when your website belongs to a group where trust and accountability to customers are worth far more than the certificate price. Here are the situations where buying SSL from AsiaGB makes sense.

• E-commerce and online stores — paid SSL with warranty reduces customer hesitation when entering card details or paying, improving conversion rates.
• Corporate and B2B websites — OV SSL (from THB 4,000/year) displays a verified organization name, assuring partners and customers they're dealing with a real legal entity.
• Financial institutions and sites handling sensitive data — EV SSL (from THB 7,000/year) undergoes the strictest verification, ideal for sites that require the highest level of trust.
• When you need a warranty — paid SSL includes financial protection from tens of thousands to millions of USD if the CA mis-issues a certificate and it causes a loss.
• When you want to reduce operational risk — the 1-year lifespan of paid SSL minimizes renewal events compared with Let's Encrypt's 90-day cycle.

The Myth That Free SSL Is Less Secure

One of the most common misconceptions is that "free SSL is less secure than paid SSL." The truth is that the encryption strength is identical. Both Let's Encrypt and paid SSL use the same version of the TLS protocol and the same industry-standard cipher suites and key lengths (such as RSA 2048-bit or ECDSA). Traffic flowing through either type is encrypted with the same level of security.

The real difference has nothing to do with encryption — it lies in three areas: (1) validation level — DV only confirms domain ownership, while OV/EV verify organizational identity; (2) warranty — financial protection available only with paid SSL; and (3) certificate lifespan — 90 days for Let's Encrypt versus 1 year for paid SSL. So choosing free SSL does not make your site less secure in terms of encryption; it simply lacks the identity-validation and warranty benefits.

Summary: Which Should You Choose?

For small to medium businesses, e-commerce sites, or any organization that needs to build customer confidence online, paid SSL from RapidSSL, GeoTrust, or DigiCert starting at THB 1,000/year delivers compelling value compared to the trust and benefits it provides.

Frequently Asked Questions (FAQ)

Is free SSL from Let's Encrypt really less secure than paid SSL?

No. The encryption in Let's Encrypt and paid SSL is identical in strength — both use the same TLS protocols and cipher suites. The difference lies in the validation level (DV/OV/EV), warranty, and certificate lifespan, not in encryption strength.

Which types of websites should pay for SSL instead of using Let's Encrypt?

E-commerce sites that accept payments, corporate or financial institution sites that want to display their company name via OV/EV, and businesses that need warranty coverage should choose paid SSL. AsiaGB offers DV from THB 1,000/year, OV from THB 4,000/year, and EV from THB 7,000/year.

Does Google treat free SSL and paid SSL differently for SEO?

No. Google only cares whether your site uses HTTPS — it does not distinguish between free and paid SSL. Both deliver the same SEO benefit as an HTTPS ranking signal. Having any SSL is always better than having none.

Does Let's Encrypt's 90-day validity mean I must renew it manually every time?

Normally your hosting system sets up auto-renewal every 60-90 days, so you don't have to do it manually. But if auto-renewal fails — due to DNS changes or temporary server downtime — your site will immediately show a "Not Secure" warning, so consistent renewal monitoring is essential.