Best Text to Speech API Free Tier in 2026: What You Actually Get

Most TTS APIs advertise a free tier in the headline and bury the restrictions in footnotes. Card required. Watermarked output. Rate-limited to unusable. Limited to one language.

This post compares the actual free tiers across the major providers, quantifies what 2,000 credits of audio means in practice, and walks through how to start using Audexum without entering a credit card.

Why Free Tier Matters

Free tiers serve two legitimate purposes:

• Integration testing: You need to know the API works with your stack before paying for it.
• Low-volume production use: Hobby projects, internal tools, and early-stage products often have actual usage that fits comfortably in a free tier.

The difference between a genuinely useful free tier and a marketing checkbox is whether the output is production-quality (no audible watermark, no audio artifacts) and whether you can use it without submitting a credit card.

Free Tier Comparison

• ElevenLabs' free plan has had varying card requirements over time. As of 2026, some plan tiers require card verification for API access.
• Google Cloud's 1M free characters apply to their Standard voices. WaveNet and Neural2 voices have a much lower free allocation ($4–$16/1M for premium voices).
• OpenAI TTS has no free tier at all: you pay from the first character.

What 2,000 Credits Gets You

At a normal reading pace of approximately 130 words per minute and roughly 5 characters per word (including spaces), 2,000 credits (1 credit = 1 TTS character) works out to:

2,000 credits / 5 chars per word = 400 words
400 words / 130 words per minute = ~3 minutes of audio

That is enough for:

• Roughly 3 minutes of synthesized narration, plus 250 more credits (about 20 seconds) every day after
• A 400-word product blurb or FAQ answer read aloud
• 6–8 short notification messages ("Your order shipped", "Payment received"), refreshed daily, not spent once
• A first pass at an e-learning module's narration, with more arriving every day to keep testing
• One short product-tour voiceover

The free credits (a 2,000-credit signup bonus, 250 on your first API key and 250 a day) are enough to build and test a first integration before committing to a paid plan.

Signup Walkthrough (Audexum)

No card required. The process takes about two minutes.

Step 1: Create an account

Go to audexum.com/signup and click Sign Up. Enter your email and set a password. No trial period: the free tier is permanent.

Step 2: Get your API key

After email confirmation, open the dashboard and go to API Keys. Click "Create key". You will see a key starting with sk_live_. Copy it: it is only shown once.

Step 3: Make your first call

import requests

response = requests.post(
    "https://audexum.com/api/v1/tts",
    headers={
        "Authorization": "Bearer sk_live_abc123xyz",
        "Content-Type": "application/json",
    },
    json={
        "text": "This is a test. The API is working.",
        "voice_id": "en_us_female_01",
    },
)

with open("test.wav", "wb") as f:
    f.write(response.content)

That call consumes 36 credits of your 2,000-credit signup grant (plus 250 more arriving every day).

Step 4: Check your usage

The dashboard shows characters used and remaining for the current billing period. There is also a usage endpoint:

usage = requests.get(
    "https://audexum.com/api/usage",
    headers={"Authorization": "Bearer sk_live_abc123xyz"},
).json()

print(f"Used: {usage['monthly_used']:,}")
print(f"Remaining: {usage['monthly_remaining']:,}")
print(f"Grant: {usage['monthly_grant']:,}")

Upgrade Path

When the free tier is no longer enough, the upgrade is one click in the dashboard. No migration, no key rotation: the same sk_live_ key works on paid plans.

The Pro plan at €29/month covers 1,200,000 credits, the lowest-cost paid tier. That volume is high enough for most small production apps to stay on it for months.

When to use PAYG

Pay-as-you-go at €28/1M credits is worth considering when:

• Your usage is seasonal (a large batch one month, minimal the next)
• You are building a pipeline that processes documents in bulk and does not need ongoing monthly allocation
• You want to avoid the overhead of choosing a plan tier

There is no minimum spend on PAYG.

Practical Limits to Know

Before you build:

• Request size limit: 5,000 characters per API call. For longer texts, split at sentence boundaries and concatenate the WAV files.
• Rate limit on free tier: 10 requests per minute. Paid plans have higher limits.
• Output format: WAV by default. Pass "format": "mp3" for compressed output.
• No audible watermark on any plan: free-tier output is identical in quality to paid-tier output: no spoken branding, no tone, no degradation. Every file does carry an inaudible AudioSeal marker, on every plan, because EU AI Act art. 50 requires generated audio to be machine-readably marked. See /ai-disclosure.

Bottom Line

If you need to evaluate a TTS API without committing payment details, Audexum is the only major provider that offers 2,000 free credits + 250 a day with no card, no audible watermark, and full language access. The ~46 minutes of audio that grant represents is more than enough to cover most integration and testing scenarios.

Sign up at audexum.com/signup and your key is ready in under two minutes.

• Related: Cheapest text-to-speech API in 2026
• Related: ElevenLabs alternative with a free tier
• Related: Text to speech API Python tutorial

By Petar, founder of Audexum. No credit card required. That is a design decision, not a coincidence.